Different and unique effects for different champs.
Lots of tanks with a big hitbox- Heavy- Resists knockups and knock backs by 30%. As tanks shouldn't be focused by CC I don't think this would be game breaking. If anything cool when lee tries to kick naut away only to see him lol.
Why can a champion with a title of scout see the same distance as a blind person? Far sighted- Teemo gains increased vision. Short sighted- Lee's vision is reduced. Or possibly Lee has no vision, similar to rek'sai. Lee hears movement, abilities reveal champs... oh wait. (lee would get some sweet buffs with the latter.)
Braum is a manly man- Does 1% of max hp onhit.
Graves doesn't kite you... you kite him(even as garen)- Autos do 120% damage at half range and closer to target while 80% damage at more than half. (or give this to a shotgun wielding new champ.)
Maokai- Juicy nutrients- After standing in place mao roots himself in place gaining double hp/5 while standing still. Triple if in the river.
Braum loves little people- When braum and a yordle stand by each other the yordle will take the poro's place in braum's animation.
I don't think any of these would really push anyone over the top. Would be excited to see some cool unique little changes here and there to make the champ puddle a little bigger.
Anyone else got cool ideas or thinks some up please add them!!!