I’m terrible at turning complete strangers into friends. I’m amazed how somebody can meet a random person on the street, start up a conversation, and schedule a meetup within two minutes. I could never do this, and at my age it’s not a skill I’m likely to learn.
I totally relate. I can’t fix anything, no matter how simple. My motto is “call a professional.”
I have no sense of decorating (or art in general) at all. I understand some basics, like “Balance the small interesting object with a large uninteresting object,” but two pictures will get hung exactly symmetrically. And I mean symmetrical to the 1/8”. Give me one large painting and two small pictures and the installation will be symmetrical yet again. If I have a large vase and a small urn to put on a mantel, I’ll probably put the urn in the attic and buy another identical vase.
OTOH, while I hate doing it, I’m extremely good at home repairs and fixing things (including cars, computers, and electrical systems). My father taught me a lot about car and household repairs, but I don’t get a lot of satisfaction or get much pride from repairs. I have the tools and I know I can do it…so why would I be proud when it gets done? All it took was some time. I consider it comparable to doing the laundry or changing the bedclothes.
I’m pretty good at most of the things noted above. I guess I never think that there are people who can’t do them. But I always really sucked at engineering sciences like thermodynamics, statics and calculus and the like. I may be the only person on this board that failed out of two separate engineering curricula: civil and metallurgical.
But at least I can fix shit.
Probably drawing, or visual art in general. I can’t draw to save my life.
It’s a genetic thing, I believe. My younger daughter can grap a napkin and a pen and produce a realistic sketch in a few seconds.
I like a lot of visual art, it’s not as if I’m indifferent to it. Just can’t produce it myself.
Cooking anything other than the most basic of meals. I can fry a hamburger, grill a steak/fish or a batch of brownies. You want side dishes, then you are making them.
Spaghetti and meatballs is just too complicated for me to even try, even with pre-made and pre-cooked meatballs.
I cannot sing to save my life. I can get the cadence and rhythm maybe sorta close, but whatever notes I’m producing have nothing to do with the actual notes of the song.
It’s a shame. I enjoy music and would like to be able to sing, but it’s not happening.
Singing
Dancing
Convincing people of anything (to the point that I’ve made people who were neutral take the opposite side by trying to convince them 
)
Same. Plus playing an instrument. I don’t have an ear for the “beat” of music. I can’t even clap along.
Ironing and folding clothes, especially dress shirts. T-shirts and jeans are ok, but everything more complicated ends in a mess still having crinkles. I can’t remember how I survived boot camp when I was in the Bundeswehr, when there were weekly locker controls and everything had to be folded at exactly Din A4 size. Maybe my roommates saved my ass, I have suppressed those painful memories.
And don’t ask me about house cleaning, I’ll never understand how my mother has always kept her home so clean that you could eat from the floor anytime.
At least I’m a good cook, that’s what I learned from my mom.
I have to go with singing, too. It’s a crying shame, because I really enjoy singing, but I can’t carry a tune in a bucket. Consequently, I never sing in public. My wife and kids have heard me sing, but that’s about it. When my wife hears me singing, she will sometimes recommend that I “find a key and stick with it.”
I am really seriously bad at maintaining friendships. Or even forming them in the first place.
Since each of us suck at millions of things (and we seem to be fine with that), I’m working under the assumption that this thread is for things we suck at, but wish we didn’t or don’t understand why we do.
If that is the case, tennis (the phsycial sport) and Defender (the arcade game). There is no reason for me to suck at either. But I do. I really do.
I was always relatively athletic, football and basketball while young, basketball and baseball once I hit my teens. I can even work my way around a racquetball court without a problem. Tennis? I suck hard.
I’ve also been very good at most video games, even the ones that some people find tricky, such as Tempest and Centipede. I’ve spent a lot of money playing Defender and remain barely better than when I played for the first time.
Remembering or recognizing language characters. I’ve tried for 30 years to become literate in Chinese and I’m still at maybe 2nd-grader level of reading.
Singing. It’s frustrating, because I play, compose, record songs with drums, bass, guitar, keys, and I’d love to be able to sing competently over it, but I just can’t. Like I’m not tone deaf – I have to slide around to find the note and maybe sometimes I can hit the melody fairly closely, but it sounds like shit. The timbre is awful. I’ve just accepted my vocals as being, um, “idiosyncratic.” “Unconventional.” Ugh.
With several years of dedicated study and practice, I could probably get my handwriting up to the level of “illegible”
Remembering things. I have a habit of not retaining information I need. If I really apply myself I can. But unless I do, information just floats away like a butterfly.
ETA:
Oh, and this. I can sing along with recorded music, but just me and my guitar… nope.
Another vote for singing, which is funny because I worked in the professional audio industrial for a while, doing sales.
The Japanese customers loved going to karaoke and there was never a chance in hell that I was going to sing in front of sound engineers.
The other is recognizing faces and keeping track of names.
While I don’t have complete face blindness, I’ve confirmed this by the results of on online tests. My wife scored perfectly and I did horribly.
She likes to watch Korean tv dramas, but I can’t keep the actors straight.
Spelling. Singing. Names and faces. Oh, and I’m really bad with time. Both on a micro and macro scale. I have trouble being on time, and also have trouble keeping track of what things are happening when. It’s not uncommon for me to double book myself, and then i have to cancel the one i like more because i made a commitment to someone re the other one.
First aid. Anything medical that’s more than just finding a pill in a bottle. I am very squeamish around blood.