I like football more as a spectator sport, but find that generally the sight lines on the action to be pretty awful. Being down too low isn't great, and being too high is a worthless experience. Being stuck in the end zone can either be amazing or the worst seat in the house.
Baseball is pretty great in that all seats are pretty good (except for behind the foul poles), you can carry on a good conversation with your date/friends, you can play around on your smartphone in between action and not look like a douche and they do a good job of keeping you entertained between innings with video/trivia/games/giveaways etc.
The big downside is that the only real tension happens in the last three innings, which can sometimes take 2 1/2 - 3 hours to get there or it could not happen at all (if it's a blowout).