I tend to like things in BF4 that others dislike.
I miss the suppression from BF3, it set the game apart from other FPSes.
Levelling up is way too fast, why they added XP boosts I'll never understand. I rarely play BF4 compared to BF3 and I am already level 100, in BF3 I never reached level 100 even with vastly more playtime. I don't understand why there are complaints about it being too slow, it doesn't make sense to me.
The amount of weapon lag is annoying. This is the simulation of weapons having weight and inertia when turning, I think it is a bit too high considering my next point.
Sensitivity ramping for aiming is too flat. It feels like the ramp is lineal rather than exponential in nature. This could be why some people are having problems with aiming. It also amplifies the weapon lag issues.