As far as I can tell from various friends, Catholicism seems like less fun Judaism. Though that observation probably won't help your research much.
Mardis Gras and a hundred other celebrations are originally catholic... sounds fun to me. Plus stuff like the "Bad Popes" is great. A Cadaver Synod is called for now and again, frankly. My personal experience is that catholic wedding receptions tend to feature a lot more drunkenness and silly dancing than protestant ones-- I'd be curious as to how a jewish one rates on the debauchery scale. And we all know what the Red Hot Chili Peppers taught us about Catholic school girls.
and for certain values of "fun"--
I generally think that a lot of smart westerners tend to underrate the interestingness and depth of catholic/christian religious thought: from the psychedelic meister eckhart to the insanely systematic aquinas, from the asceticism of thomas à kempis to the seriously interesting life of st. francis: heck, from ignatius of loyola and josemaría escrivá to cardinal newmand and gk chesterton, there are many interesting writers, thinkers and lives bound up in the church. I think that because it's so close to us, we sometimes have a harder time seeing it, whileas the tripitaka or something seems removed from politics and history.
(And in case you don't remember from older threads-- and why would you?-- I'm a pretty determined atheist. I just find this stuff interesting. Not to mention the sheer dungeons and dragons-like pleasure to be had from actually parsing out the specifics of catholic theology like limbo and transubstantiation.)