Inspired by the recently revived Cross-dressing Men thread.
Provided you are open to an open casket funeral and manglization of your body is somewhat repairable, what do you want to wear to your own funeral? Conventional suit and tie? Casual wear? Full-on Tartan? Little black dress with a string of pearls? Birthday suit? Furry suit? Other?
I plan to be cremated. But, in the spirit of not fighting the hypothetical:
I’d likely go with either a good suit, or something appropriately nerdy for me, maybe one of my Star Wars-themed hockey jerseys. People who know and love me would understand. 
I would like to have a closed casket funeral. If I had to have an open casket funeral, I guess I would go with either my 1866 Austro-Prussian War Saxon Artillery reenactment uniform or my pipe band uniform.
I entered the world naked and slimy, I intend to leave it the same way.
Black tank and black pants, otherwise people would think it wasnt me.
When my dad died, at the visitation, my youngest sister said she wanted him to be wearing a shirt that said “I died and all I got was this lousy t-shirt!” Just a little dark humor, but Dad would have loved it.
As for me, maybe my fuzzy robe and slippers? Purely hypothetical, since my remains are being donated for teaching or research or whatever.
Ordinary suit. I’m not certain what kind of funeral there will be, if any, but my family’s tradition is open casket viewing followed by closed casket funeral. I have no reason to want to be silly or shock anybody, so would like to look boringly conventional for the viewing if we go that route.
A silver spacesuit like they had on Lost in Space, I always thought those were so cool. Maybe they could stand me upright in a clear glass tube to complete my final fantasy. 
Maybe one of my black T-shirts with a logo from my book series or a snarky slogan on it, a blazer, and jeans. Definitely no dresses. Nobody I’ve known in the last 40+ years would even recognize me in any sort of dress-like object.
Having been boringly and reliably straight forward for the past 60 odd years, would think that if I was dressed to the 9’s in a plunging sequined taffeta ballgown while laid out in the box that anyone attending might well think the event had been staged, and I was off somewhere else in a belated life of Reilly.
So, were the option available I’d likely have on my best suit.
Would be a waste of a good suit … but who else would wear it and it’s not that good anyway.
I’m stealing that … though I’ll spell it properly with an “s” 
I have a Grumpy Cat (RIP) tee shirt that says, “This is my happy face.” Put me in that and a pair of jeans and I’m good.
the green Borat … ahem … Speedo … just for shit&giggles
not sure my wish would be respected (just like in life)
“Just stand me out in the garbage with my hat on” - Lou Grant, The Mary Tyler Moore Show.
Works for me as well.
Welll, my b-day suit as I’m going to be cremated and if it goes my way no funeral. But to honor the thread, dark purple yoga pants and a t-shirt or hoodie (depending on the weather doncha’ know) with a quarter moon and sun theme. A peace sign would be alrignt.
When my dad died we opted to bury him in athletic pants and jacket, and a ball cap. I was very insistent that he wear shoes and socks as he never ever went without both.
To paraphrase Woody Allen, I would rather not be there at all.
I think my wetsuit would seem most natural for me. I think it would be hard to get my stiff old self into it so will go with my sport coat and slacks.
Since I plan to be cremated, something light and, preferably, highly flammable.
A fibreglass C-3PO costume.
Bonus points if you rig up a little speaker in your coffin, to play Anthony Daniels whining, “We were made to suffer, it’s our lot in life.”
I will be cremated and have absolutely forbidden an open casket wake, but in the spirit of the thread, a Carhartt tee shirt, Levi 501 jeans and my rattlesnake skin cowboy boots…