My current group plays D&D 4E, and my previous group preferred Pathfinder. I like both well enough. The various groups I have played with have dabbled in other systems, as well. Some were really fun, and others were bad enough to never want to revisit them.

I prefer games to have a good mix of story and action, but I often find myself leaning more toward a good fight (sometimes I just want to kill some orcs, you know?).