Yep, like mixsit, I have a template setup for Drums, Guitars, lead vocals, bg vocals, synths, strings, and misc.
Anything that I will have more than one track or instance of, gets sent to a bus for global treatment. Bass I leave out, as I only deal with a DI track, not DI and amp. If that were the case, I'd buss 'em.
I usually have my lead vocals broken into sections and placed on separate tracks, so bussing them makes sense for treating them the same.
I also find it to be incredibly valuable when a group needs to be lowered, to just have one fader to deal with, not multiple.
For BG vocals, I compress each separately, and then the whole buss too. This really seems to solidify them as a unit, if that's what you're going for.