I've been in 1B and 2A (never 4F). I would avoid row 4 simply because its further back closer to toilets and galley. And more people passing by you to get to both.
I loved 2A. Nice window view, if you're into that. One small minor downside--I didn't like sitting so close to the person in 2D.
I liked 1B too (I dont care about windows). It felt very private, and you feel like you are the only one on the plane!