this guy here should make a cool cosplay

heh.
ok jokes aside is there any given theme you want? like cyber-punk or magical, maybe school-esque well anyway it should narrow down the lists people would give you.
also your given physical size would make a difference in these suggestions, like for example a tall person wouldn't fit an index cosplay nor will a chubby guy fit touma cosplay.
ps: flashy cool cosplays tends to be cyber-punks or big-ass sword/gun wielding characters since these things tends to mask how ugly the person is, well no offense. or simply you're a living bishonen cosplaying FMA:Edward, FF:Cloud or CG:Lelouch.
also do note that doing a bigshot cosplay like bleach, onepiece, naruto, etc. would get you ridiculed if you do it wrong, specially from critics. so you outa stay away from those.