Funny enough, sometimes when I don't play a certain game for a long time, I'm much better at it when I do get back to it.
I had a friend over and I wanted to show him how bullshit Catherine can be on hard. I hadn't played the game for 2 years. Then I proceed to perfect the last stage by completely stupid luck.
I've had other cases of stuff like that (tetris, Stepmania, touhou games, etc.)
Maybe I somehow reset beginner's luck after a while.