Interaction Skills house rule

[AeroDm]

Basically, you're trained in whatever the heck you want to be trained in, so long as it's within your character concept, and on your class skill list (probably).

Checking the player's ability to abuse this system, is the DM's ability to assign a different ability modifier on the fly.

"Do I know how to ride a horse, of course! I grew up on a ranch. So I want to grab our halfling rogue while galloping and lift him into the saddle. That's a trained Athletics check?"

"Sure, but the modifier is Dexterity, not Strength. You're going so fast it's more about coordination and timing. Besides, the halfling isn't that heavy."

That sounds a little more cumbersome to adjudicate on the fly because it requires people to parse out their skill modifiers. They have to check their athletics, subtract their strength modifier, and then add back in their dex modifier. If that is what you're looking for I'd actually recommend checking out my house rule on skills discussed in this thread because I *think* it does most of what you want with a little more fluidity.