Now I played a bit I have some idea, I like Reaver/Healer or Sorcerer/Healer.

I found that the Healer is not uber, but gaining mana by praying and healing are really useful.

What is your favorite class? Why?

I'm not sure I could even pick one, though I've gravitated toward rogue/thief types for their ability to deal with locks and traps (not essential, but they can sure be annoying). The 'slice' ability makes for a decent right-button power attack, and those daggers are quick. The downside is having to pay close attention to your food/potion stock. They've also got some good passive abilities, and as a lazy player I tend to favor those.