What cool rules does your league have that you think differentiate it and make it a good league. May be categories, positions, draft rules, keeper leagues, fun smack talk rules, whatever.
My league has LF, CF, RF instead of OF, OF, OF which I think really adds a lot of strategy.
We use OPS instead of BA, which feeds into the typical sabermetric bent of most fantasy players compared to the larger population
Instead of just giving the first pick to the last place team last year (it's a keeper league), we let the last place team pick their preferred draft slot. Some guys prefer to pick 4th instead of 1st. Others would prefer to pick 12th instead of 6th.
Awesome. I highly recommend it. We have an 8-man minor league system. They can be kept forever until they lose rookie eligibility (so I can keep Jay Bruce in the 27th round next year) A guy in my league has Lincecum in the 24th!
Most leagues I see you just have a set number of keepers. Everyone keeps 6 or 8 or whatever, and then the draft. This results in the best players in the league being kept every year, which is kind of lame (IMO). We do it based on round drafted. And the cost goes up 3 rounds every year. I drafted McLouth in the 20th round last year and Ervin Santana in the 21st, so I can keep them in the 17th and 18th round this year, 14th and 15th round next year and 11th and 12th round the year after that. 3 Years tops, the end. Everyone back to the pool. This makes it so nobody has Albert Pujols for 8 years, and it also makes it so no one drafted in the first 3 rounds is able to be kept the next year.
The league's been around for 5 years, and so there was no feasible way to do an auction at that time. I'd love to move the league over to an auction, but I think the switchover would be a PITA.
What little quirks does your league have that you think are cool that other leagues may be able to co-opt?