I usually sit lower level, but for the playoffs against new england 2 years ago, the only tickets I could score were in the very last row of the upper level.
Now sure, sitting closer is fun, BUT the advantage to sitting last row is that there is the ledge behind you to stand on, making getting to your seats way easier than having to navigate through people. Also, if you smoke you can stand on that ledge and smoke. Well at least my friend did. Maybe still against the rules.
Also, those 200 sections are nice. I got a row 1 ticket in the 200's once which was nice.
Oh, and one more. Sitting in the last row of the lower level, underneath the luxury boxes. I was at that Raider game 3 years ago, where we lost in the blizzard. Well sitting underneath the overhang really saved our asses for that.