My reasoning for disliking black engine bay is because it smacks of laziness. I've seen nicely painted cars with black engine bays and figured that if they had the engine out, why didn't they paint the engine bay then?
I'm not a purist. I like some OEM stuff and some aftermarket stuff.
I don't like seeing aftermarket suspensions because I don't see them as an improvement. I like a modified stock based system.
I do like aftermarket wheels. Not all, but some.
Cast aluminum valve covers? Sure....Aftermarket gauges and steering wheel? Yeah, count me in.