Go on, brag a little (or a lot). We won’t judge.
I've had a few raps. By "had a few" I mean I said two clauses and
they rhymed with each other. I wouldn't say I'm "really good" at
this, but there's no "I'm mostly OK at" section.
I can say "I wish for Iris's Irish wristwatch," no matter how much
I've had to drink. Say it out loud and you'll understand.
Probability. If you ever want to know the odds that you can get
exactly one tails on your last coin flip after 29 heads, then I can
do that. There may be a real world application for this, but so far
I haven't found a career posting for "Guy who can tell us the odds
while we sit here and flip a quarter."