For me, it’s “k”. But the more I hit it, the more “k”s keep coming. IT’s like zombies.
LOL
And don't get me started on "C," which is almost as bad.
I'm not fond of switch-hitting letters, either. You're either a consonant or a vowel, dang it! Why, oh why, "Y?" Make up your mind!
I'd better stop now, lest I begin threatening to kick some alpha-butt myself, lol.