Well, I can only comment on those that I was both alive and watching, so some teams from before those may be better than my choices. I will alive for 73,78, and 79, and actually watched a very little bit in 78 and 79, but I didn't really know what I was looking at at all. So, I can't fairtly comment on those. Also, only teams that won an NC will get consideration here. Also, all of these teams below were great in my eyes, so don't take one ranked lower than another as a slight in anyway. Just how I remember them and how their particular wins made me feel at the time.
1) 2012 - That thorough pasting of Notre Dame and the fake girlfriend guy was as dominant as I have seen. Too bad the season was marred by the one hiccup to Johnny Football
2) 2011 - Revenge vs LSU where they barely got past midfield? Beautiful. AJ finally came into his own in that game, setting us up for what we did in 2012
3) 1992 - More for nostalgia and just pure, nasty defense. Watching the offense was painful at times. This was also the first undefeated season I got to witness, though there were some mighty close contests that season, or that is at least how I remember it.
4) 2015 - After that one loss to Ole Miss, Bama went on a dominating streak and brought out our second Heisman winner. Jake Coker seemed like an entirely different QB after his short benching in that game. Seems you can divide his season into two halves. Before the benching and prior vs everything after he came back in that game.
5) 2009 - I can't even believe I have this one as low as I do. It is probably my favorite or second favorite, just maybe not as dominant.
6) 2017 - One of my top 3 favorites, at least in the way we won the championship (probably #1 in that regard, actually). But if you had to say best, I don't think that team would win against some of our other teams. Though I might worry whether the 11 defense could stop a QB as mobile as Jalen as well as a mobile QB who could also throw like Tua. Hmmm....