If you'll indulge my seating preferences -- I'm a season ticket holder in the Lower West Endzone and the view is GREAT. We sit just right of the goal post, about 15 rows up and can see the entire field without any obstruction. When the teams are on our side of the 50 -- it's like being in the game. Lots of great fans there.
The East endzone is where a lot of player's families sit. We sat next to Pat Surtain's crew for the Washington-Dolphins game two years ago, when JF led the comeback on Sunday Night Football.
The Lower Sideline seats are considered the "best" because they are the most expensive (save club seats), but unless you are way up in the high 20's-30's, the view sucks.
I think where the coaches sit to call the game is the absoulte best view of the field -- but I hate the empty feeling I get in my stomach on the 400 level. We had 5th row 400's a few years back and I felt like I needed a seatbelt not to fall over the edge. My girlfriend and I live in Los Angeles so we only get to about one or two home Dolphins games per year. The rest we sell on Ebay. And as far as Ebay goes -- either NOW, or about two days before a game is the best time to buy tickets. Lower sideline face is about $80/seat for NEW season ticket buyers. Enjoy!