The first revision control system I ever used was called RCS. It was the pre-cursor to CVS and stored all revision data locally. It was nifty but very limited and not suited for group development. CVS was the first shared revisioning system I used. It was rock solid, IMHO. But it had a few big problems, like the inability to rename or move files. Everything had to be deleted and re-added.
Since those days, I've used several other revisioning systems: Perforce, Bitkeeper, Clearcase, Subversion and GIT.
I'm tired of learning yet another system. I just want to know which horse is going to win the race for the forseeable future and go all in.
That's where Google Trends comes in very handy. It quickly reveals that I need to bet on GIT.
I just hope I can make it through the next 5 years or more before having to learn the next greatest solution to our shared problem of tracking code revisions.