The Seahawks getting to the Super Bowl would be the ONLY way I would have any interest as a VERY casual NFL fan. The rest of the playoff teams were outright garbage to me in terms of drawing interest, or in the case of the Pats and Ravens teams I outright hate. I'm not going to watch a game between a team I have no interest in and a team I hate for the NFL the same way I don't for college sports, regardless of if it's the championship. Can't say I watched a second of MSU-Florida about a dozen years back for example.
Doesn't help that I actually find the NFL a much less entertaining brand of football anymore.