ME is a relatively bland shooter IMO.
On KotOR you may be missing the point. It barely has any gameplay. Combat is pretty easy and over quickly. The point of anything in that game is storytelling and fun quests, the mechanics are just good enough to not get in your way too much.
One thing to note is that many people agree that Taris sucks because it is mostly linear and the fun quests only start when the game opens up. Taris may be necessary to set up the plot, though.
I did enjoy World though it involved a lot of interacting with bad UI and walking to a monster. Can't really complain about grind, as you don't have to fight the same monster too much. The story cutscenes and missions were painfully bad.
What I did like was fighting one big enemy rather that hordes of small ones, having to be close and it being risky, exotic weapon movesets. It is great that you can and do use the environment to your advantage all the time.
I would like to see a game that does the fighting big enemies in terrain but with more physics based attacks. The hitbox-based combat where you can put your hammer inside the beast and then swing feels silly.
I didn't like the equipment upgrades much as they only get interesting late in the game and all weapons of the same base type are essentially the same.