On the other hand, you can parry much more reliably in 1 and I've killed dark knights simply by parrying them 4 times successively. Or you can backstab, since the enemies don't turn as quickly as they do in 2.

I'll agree that a lot of strategy in DaS 1 and 2 comes from careful positioning, given that replenishing your health puts you at a considerable danger while you sit immobile drinking estus and can be interrupted at any time by an attack. However, I find that the two games have a definitely different feel to them, even though they're woven from the same cloth. Another thing is that the camera in DaS2 is much, much faster, due to being truly mouse controlled - you can turn as fast as you can swing your mouse (I still recommend using AutoHotkey to bind mouse buttons to keyboard buttons because otherwise you get lag on attack, due to the game waiting a frame or two to check if you're not double-clicking, since you can bind different actions on single and double click; it's not the end of the world, but it's annoying). In 1, not only is m+kb absolutely unworkable, the mouse has a negative acceleration applied and you can't turn any faster than with a joypad.

I like both, but if you play a long enough time these small differences start getting really obvious.

Also, I haven't seen someone mention the Serious Sam games, so there.