I have twice, and maybe again. But it has to be strictly for the fun, the cosplay I have seen just feels wrong.
There are 3 part to cospley,
I rarely see a good mix of all three.
Also I am a little jaded after losing to a guy who happens to look just like a Ury? Ishida (tall, skinny and had a solid six pack) and then dropped over $900 on a high end costume his parents bought him. After I spent weeks working my butt off to build a costume of the Space colony A.I. Leopard and dropping over 15 pounds to make it work. I picked a robot because let's face it I anti got the body for more common characters.
Picking the character is the hardest part, getting creative with the construction is the most fun, sharing with friends at a small anime party priceless.
Thing is I have lost a lot more weight since then, but still not sexy enough can't go shirtless. Too thin to go as fat man, too fat to go as everything else. I am An Endomorphs, and my huge shoulders and short square frame now hides a good amount of muscle. But that's not how carttons and cpomic draw perople.