When it comes to lanes, my personal stance is this:
-Top Laners need the ability to defend themselves
-Mid Laners need the ability to instantly be a threat to their opponent
-Supports need some sort of non-gold scaling usefulness
-APC or ADC I don't care, just so long as you devote yourself entirely towards it
Whereas so long as you can get past your first clear with Jungle, I really don't care who you jungle with.
See, Top Laners that can't defend themselves tend to fail because the moment they screw up in a lane so isolated and don't have the ability to defend themselves thereafter, they're screwed. Mid Laners tend to almost always want some way to threaten the opponent, be it range or a gap closer, because of how dominant abilities and cool down abusing is in Mid Lane. Supports obviously need to be able to handle not having gold, and carries are carries regardless if they do Magic Damage or Physical Damage, just don't wuss out without building full offense.
I always thought this was a fair assessment for standards I should keep. I'm perfectly fine with people playing Master Yi mid because Master Yi's Alpha Strike is perfect for abusing cool downs (Not to mention dodging skill shots), for example, but I would heavily criticize against Garen mid against any non-melee matchup. I consider myself relatively lax about what champions should go where, what's important to me however is that it has to make sense.
Does that sound fair or am I just a stick in the mud?