For me, I loved my long leagues. I bowled in 2 of them, one on Thursdays and the other on Sundays. I just finished subing in a men's league which I've never done before for the last 6 weeks of the season, which was cool because before I came in, the team was in 6th. We ended the season as the champs. Right now I'm bowling in 2 Battle of the Sexes leagues on Tuesdays and Thursdays. Just 12 weeks, really short, but the money isn't. $2000 for first place in both houses!
I'm not a great bowler, (196 avg), I just love to bowl. I will be entering more tournaments as time goes because that's the one area I haven't done a lot.
The longer, the better. I tend to do better in the longer leagues.