Hm, I thought Titan Quest was absolutely terrible. The game difficulty was incredibly unbalanced with most mobs being merely trash to wade through and others being utterly lethal (those being basically anything that shot arrows/spat poison/flung spells at me), and meant instant death if taken on more than 1 or 2 at a time. It was also super easy to get totally owned by the very first mobs you encounter when starting the game. First time I loaded up TQ a boar gored me to death in about 5 seconds flat, I didn't even know what the Eff happened, I was just dead. I didn't play the game after that for about 3 years or so.
Also, I found the skill trees to also be wacked out and boring, and the game dropped too much crap making you play inventory tetris and run gauntlets back and forth between the wilderness and the shopkeeper back in town far too much of the time.