Jennifer Lopez -- My Choice in Men Just Sucks!

Jennifer Lopez just massacred Marc Anthony, Ben Affleck, Diddy and worst of all ... Casper Smart!

JLo had a little truth slip on "American Idol" Wednesday night ... letting fellow judges Harry Connick Jr. and Keith Urban in on a secret -- she's awesome, but the problem lies with the men she chooses.

We forgot poor Chris Judd. She thinks he sucks too.