I promised to have some comments about Batman: Arkham Asylum, but I find that Zero Punctuation covers everything I would want to say. Great fun, I should try more stealth-based games since I also enjoyed the alien in Alien vs. Predator.
I never especially got the hang of the combat. This stems from a tendency that applies to other games and metaphorically to real life: I do not tank. I will always always always choose evading over blocking. I use ranged attacks, I kite, I play high Dexterity characters, I CC, I do not take an axe to the face if I can at all help it. This is probably just misplaced meatspace instincts, but my immediate reaction to a troll is to dodge the club rather than parrying it with my hobbit’s dagger.
In some games, this provides a real benefit. Attacks will have secondary effects, so evading attacks also evades debuffs. Other games let blocks or parries also stop the debuff component, whether or not that makes any sense. Some games have shields/armor reduce damage rather than deflect attacks, which means you get the debuff. And did I mention the 100-stone troll with a similarly huge axe planting it in your skull? That could ruin your whole day.
In many games, the proper move is “block and counter.” My plan is closer to “dive and shoot from behind cover.”