Ah yeah, no. As much as I enjoy Jensen Ackles, I never have seen an episode of Supernatural. It seems interesting, I just don't watch a lot of TV. Smallville and Grey's Anatomy really are the only shows I pay any attention to these days to be honest - I just don't have time to get invested in new shows since I can barely keep up with those two every week as it is LOL.
And since Supernatural airs opposite Grey's Anatomy, well it will lose out. I would guess Jensen Ackles is a big part of the crossover appeal, and he's probably why many SV fans watch the show, like you said.
As for season 7, the only thing I disagree with so far is the continuing Clana crap - but speaking of Jensen Ackles, I still think Lana should have stayed in Paris and been long gone when season 4 rolled around!
Other than that, the first 3 episodes have been great IMHO - as long as you erase Lana from them. We know this is Lex's last season, and probably Lana's as well. So chances are they will both go out with a bang. Lex to me is one of the more interesting characters in the show, certainly the most complex, so I'm enjoying watching his inner-conflict develop. To each their own.
Until season 6 I was a casual watcher of the show. It definitely has had its up and downs, and there have been entire seasons where I wondered why I still continued to watch LOL. Then the first half of season 6 hit and I became obsessed with it, and I haven't been this hooked on a show since L&C was on the air - that's saying a lot. Now I'm just enjoying the ride.
If Dean turns out to be Vandal Savage, which I'm hoping - and almost assuming - he will, that will be an exciting thing to see!
Either way, as always I am holding my breath for Thursday night!