Back when I got my camera, the only software that could edit the AVCHD footy it shot was Vegas. So I edit on that pretty much exclusively while playing around with motion graphics on after effects.
Just can't seem to bring myself to learn Premiere. Vegas is a little simpler, and doesn't have quite as many features, but for just straight video editing it works really well. It has a fairly different interface from Premiere or FInal Cut though, so if you want to be more up to date with the industry standard, I'd recommend against vegas...