Okay, I realize this post is turning into a novel...
Tier 1: High-school boys hoops, wayyyyyy ahead of anything. Centered around NorCal where I live, but I watch other states online, too. I've been a big fan of Aidan's school, Campolindo, since the late 80's. Even when I moved to Oregon in the 90's, I kept up with Campo games online... When I moved back, I jumped riiiiiight back in...
This tier is like 50 miles above Tier 2, unless a high-school baller I've followed gets into a D1 college, like Aidan Mahaney has. But even then, that moves it only somewhat closer, like 25 miles...
So, I'll say UConn men's hoops occupies Tier 2 all by itself. Before Aidan transferred, SMC had this tier to itself.
Tier 3: Women/girls hoop, once again the level of intensity depends on who I've followed at the time... Paige and Caitlin have raised said intensity quite a bit. I don't usually get a lot of chances to see local girls HS. I would if they'd play alternating nights or something...
Tier 4: HS football, especially Campolindo.
Tier 5: Giants baseball with a near-equal hate of the Dodgers. In the last couple years, Rangers hockey.
Tier 6 is for stuff I used to be into but not much anymore: UCLA basketball... That's where I got into the game, seeing John Wooden's powerhouse starting when I was 8. This is the only SoCal team I like. Also horse racing, which was by far my favorite sport for a long time... The way American racing has been run the last few years, I have almost completely quit paying attention altogether. I do still play Derbyfever, an amazing MMORPG, and am still just as heavily involved in this game despite my growing distaste for American racing.
GIGANTIC gap.....
Tier 500 million: Soccer. Even though my HS had a good team (for a small school) and I covered the games for my HS newspaper... I have never ever come close to liking this silly game, and never ever will.