Myself? Most of my "Cosplays" are OCs. I just feel a lot more comfortable in my own characters' costumes than in another.
For others? If you like it, go for it! It's just like Roleplaying, some people prefer Canons, and some prefer OCs, either way you want to slice it is fine with you. If I see a lovely costume, I'll compliment someone on it, regardless if I know the character or not~
What is normal? What is weird? Is it, perhaps, one's point of view that determines a mindset. Perhaps, to I, what you do is strange, but, of course, to you, it is completely normal.
That, my dears, is why life is so exciting, because we are different from one-another.
Care to get in contact with me?
Drop me an Instant Messenge, I'd be honoured to speak with you~