I don't usually, but at the moment I'm playing a bunch at once.
On the go I've currently got:
M&R Kingdom Battle
M&L: Superstar Saga + Bowser's Minions (a small shop near me broke street date, by a loooooooooot)
Earthbound
Puyo Puyo Tetris S
I'm almost done with Kingdom Battle, Earthbound I've done before so I'm not too focused on, but Superstar Saga + Bowser's Minions is fantastic so far, definitely worth the purchase.