Fantasy Baseball

Anyone on here in any fantasy baseball leagues? I've never participated in a league before, and am hesitant due to the long season. But I am wondering if there are any good ones out there that are actually fun, and do their best to maintain interest from all team owners.

Oh, and also because I might try to spin one up at some point in the near future (most likely one for $$$, as long as I can find enough owners who are interested).