Competition aside, I like several of the college rules better than the pros rules. I am a fan of having wider hash marks. I like wide sides and short sides of the field so there's more challenges and opportunities for the offense to attack and the defense to cover. You can't run the same play to the right or the left regardless of the hash mark. The wide side also forces more unbalance into schemes. In terms of kicking, making for a harder angle closer in introduces less certainty on short field goals. OTOH, I prefer PIs to be spot fouls rather than 15 yards.