College football for me by far
pro football is great with teasers and totals, but it's a very hard sport to win betting straight up ATS long term. Lines are so sharp and you don't even feel comfortable betting on 7 point favorites because of the parity in the league
I think college football is the most predictable sport out there - u bet on 2 high scoring/bad defensive teams and you almost always get a high scoring game, not to mention teams like wisconsin and stanford that cover spreads at an insane rate