I don't know, I've only been in Corruption, and have yet to enter a Crimson world.
(ugh I hate those "Soul Eater" things, and those giant worms that keep flying through the caves, they're so damn annoying :P)
You only think so because you've not been in crimson yet. Crimson spiders walk on backwalls so they get everywhere so there's no peace to be had in crimson (haven't enabled hardmode yet so can't say anything about crimson after hell). I also liked eater of world boss better than brain of chtulu.
And where the heck is gold? I've yet to find vein and I've been to hell's upper layer.