Or what GuanoLad said before me. :o
I’d like to be able to fart whenever I wanted to.
Tim
“My hovercraft is full of eels.”
You mean you can’t? 
As for my design change, I want variable sensory inputs. See better in the dark, dimmers for bright sun, turn the hearing down at staff meetings, that kind of thing.
Livin’ on Tums, Vitamin E and Rogaine
Inspired by various other threads:
Everyone has both sets of sexual organs. You can still dress, act, sound like, etc. your favorite gender. But you and your partner could enjoy male/female, female/female, male/male, or female/male sexual acts anytime you wanted.
Might put a dent in sexism and homophobia, too.
Come to think of it (no pun intended), it would make masturbation more interesting, too.
It’d make going to the bathroom a little messy as well.
LOL! Good one, Louie.
Let’s assume you could choose either plumbing for that, okay?
Relocate (or add an auxillary set of) breasts to the back so I can play with 'em while we dance.
Stronger, sharper teeth - like a dog. Do dogs get cavities, BTW?
Do away with the right-handed/left-handed shit, already. If I’m writing (or something) and my hand gets tired, 'twood be nice to just switch hands.
TennHippie
If we could get there, there wouldn’t be genders anymore;…I don’t think. Hmmm, you could go philosophical on that one.
Frankly, (mix of unisex and not) poopin’ & peein’ could be improved, as could ageing. I really don’t have any use for hairs on my ears.
Let’s assume you could choose either plumbing for that, okay?
Even for menses? Ewwww
Female - I liked phouka’s idea, but I would put that bad boy in the vagina. Two cookies for the price of one.
Ayesha - Lioness
I’m out of my mind, but,
feel free to leave a message
Gee, you guys have a one track mind…I was just going to say a refrigerated compartment so your chocolates wouldn’t melt in the summer. 
<font size=7>Wings!</font>
Remember that dream----the one where you flap your arms? Every single person I have ever met has had that dream.We all want to fly.
“The truth is uncontrovertible. Panic may resent it; ignorance may deride it; malice may destroy it, but there it is.”-Sir Winston Churchill
UNISEX: Going along with the wings, I’m surprised no one has mentioned gills. Eliminate drownings and open up more of the Earth for exploration. Also, no more water up your nose. I hate that!
I know this isn’t PC but which of my posts are. Remove the larynx from women. Benefit?
Peace on Earth.
Second the motion on the tail. It should be both as expressive as a cat’s tail - lithe and supple; and as strong as a kangaroo’s so that one could lean back on it for support. Not a rational combination, but ideal.
Inserting a gene that would make humans capable of performing photosynthesis with the cells of the dermis.
Retractable wheels for going downhill.
A suitably protected on/off switch so i could sleep when I wanted to.
Make the hands just as sensitive as the genitalia.
Bad idea, Rys. Have you ever tripped on asphalt, and used your hands to break the fall?