End zone is the best experience, IMO. I've had upper level, different yard lines, but the EZ is the best experience. Yes, depth judgement on placement is tougher, and when they are at the other end of the stadium from you it is far away. However, when they are right in front of you, OMG. It is amazing. Tim Hightower scored in the NFC title game right in front of us. I jumped down and patted Dansby's helmet when he scored in our endzone in the Packers playoff game to end it. So many ridiculous good plays there that are basically in your lap. We are 5th row in 117, and take our three kids.
Shane H doesn't like the endzone view, but to me the ultimate high of when they are in your area of the field is unmatched, and balances out any lesser view you might receive. And I personally like the view when they are on the other side of the field because you get a lot of the perspective of the blocking.