I already played it several years ago with the barbarian, now I finished it with the knight.
I will play them all, eventually! :)

I must say though that I prefered the knight, he's much more versatile and he knows so many different combos he can always have the edge.
The barbarian is -imo- terrible in the beginning, too slow and squishy; I ended up finding the early levels much more difficult than the final ones.

You have two more characters to experience this amazing game with! The dwarf's starting level is the best of all, in my opinion. And to play with the amazon is so much fun - she just mows down enemies.

There's this super-challenge in the achievements, "finish the game in less than 8 hours with no saves". Sounds incredibly mean... I must attempt it. :P

I have done it, 100% achievements

!!!

How?

Well, he mostly ran past most of the enemies and only killed when necessary, to open doors, to take keys and so on. It worked great.

It was either this: https://www.youtube.com/watch?v=xYSTO2t4_1Y

or this one: https://www.youtube.com/watch?v=PiYcRYB7ThE