honestly, i like both, it's kinda tough to choose.
although, when it comes to wanting my world to be as intact as possible, i'd probably go with crimson, cause it doesn't cause a mile-long stretch of huge holes in the ground.
and if corruption biomes happen to spawn close to each other... oof... there goes about half of my world.
corruption is probably easier on the eyes, and feels more "natural" as a counterpart to hallow, while crimson is nightmarish and looks very alien... though i suppose that is the point.
this really shows with the biome-specific gear, as well... light's bane just looks and sounds like it properly fits, and it actually shows through in night's edge.
meanwhile, the blood butcherer... not so much.
that then brings me to my next thought... the crimson feels so... non-canon?
i mean, it lacks a hardmode boss, there is no mechanical brain... and it's just weird fighting the destroyer when there is no eater of worlds around.
it's like the game telling me i chose the wrong one, or something.
so i always feel a bit odd choosing crimson.
i feel like, if i were going with a canon story to my world, i'd probably go with corruption... but for gameplay purposes, i tend to choose crimson.
mainly because, again, it's less intrusive... and i love the golden shower spell, the enemies are really cool and creepy, it's a nice change of pace, etc.
so yeah, my final verdict is...
corruption for canon/natural feel to the world.
crimson for gameplay purposes.
Edit: well, balls... didn't realize there was another topic... sorry about that.
edited my post to make it fit more with the topic since it's not its own topic, anymore.