My favourite skill is, bar none, Steady Hands II because of its utility with pretty much every other skill that I use. I'd have to say that my favourite class is blacksmith. There are a couple of reasons for this. First, like Raminax said, they have some pretty cool AF (if it weren't for the comically huge saw, carpenter would be a close second); second, I don't know what it is, but I romanticise the concept of the sword as an extension of the wielder so making fine swords is pretty great, which is completely subjective, but there you go.