Whenever you have a spell active, everyone comments on how dangerous it is and that I should put it away... Even mages say this. Who thought this was a good idea?

I just think it makes the game more immersing. I'd rather have people interacting with me than just ignore me

They interact with you normally if you don't have a spell active, such as dead thrall, so it's immersing regardless. What I'm annoyed with is that EVERYONE is biased against magic when you have a spell active, including mages, so it's kind of annoying to hear someone say something bad about my magic use whilst they themselves are using magic. it kills the immersion for me. It also makes me less inclined to use magic... Which I dislike because I love using magic.

Speaking of magic...

What I find most annoying in Skyrim is the fact that the npc always say the same comments when you approach them. There are lots of comments that we never hear because they, basically, always say the first one they have.

I find it hilarious. I also sneak attack on companion quests and they make no mention of it either.