When I "graduated" from Dungeons & Dragons to other dice-and-paper RPGs back in my teens, I became a big fan of skill-based systems. It was The One True Way of RPGs. I dismissed class-based, level-based games as merely quaint but entertaining relics of a bygone era to me. It took a few years before I came back around in my thinking and learned to re-appreciate the strengths of class-based games. I like both styles pretty equally nowadays.
But with computer RPGs, I lean towards class-based systems. This isn't a matter of preference, but practicality. I would love to play some more, well-done skill-based CRPGs, and my hat is off to those developers bold enough to build them. But it's tough to do well. Very tough.