Never installed anything onto Minecraft. I tried a map once, but I couldn't figure out how, so I
just said"Eh, what the hell. If it doesn't work, it doesn't work." Am I the only one that has only played vanilla?
I play vanilla. I love my custom texture packs, though. I don't plan to use any mods until I 1. I've squeezed all of the enjoyment out of the vanilla game that I can (and considering I've yet to even get to the Nether yet and have a lot of building projects planned, that won't be a while) and 2. some cool mods are updated for 1.0.0.
That's what I like about the official release, is that the modding community probably, hopefully won't have to continually keep updating for completely new versions...