I use save throws a lot in my games. I rarely call for a straight ability check--every time I do, my players seem to get confused. Or they get nervous and start fishing around for Yet Another Bonus To Add.
"Make an Intelligence check."
"Is that, like, a History check?"
"Nope, just make an Intelligence check."
"Oh, like a save throw?"
"No. Roll and add your Intelligence modifier."
"I'm proficient in Nature, can I add that?"
"No, just make an Intelligence check!"
"I don't know what that means!"
So I've gotten into the habit of just asking for save throws for ability checks that don't involve a described skill (like remembering whether or not you left the campfire burning, or being able to win a game of rock-paper-scissors). It's not as distracting, and I can mentally subtract a proficiency bonus easy enough.