Ah yes, tunings. I usually use .10 gauge on my electric guitars because I tend to tune down two full steps. I'm pretty sure I have Ernie Balls on them now but I NEVER change strings, only if they break. The bass is in standard tuning and still has the stock strings. It sounds like crap if it goes down anything more then a step and I don't want to shell out $40 for a set of strings. The accoustics have .12 gauges and are also tuned down two steps. I find having my 12-string in standard tuning it was too hard to play, so I started tuning it down and did the same with everything else. I'm not in a band or anything so whatever tunings they're in they're in.
I always used the first note in Epic by Faith No More as my tuning note.