Just a meme about the alphabet

I don't get it, could you explain? Nothing comes up when I search.
You make great memes btw, guess I'm not clever enough to get this meme xD

It was a very old meme about my favourite and least favourite letters

It was that simple xDDD Btw, J, V and K don't appear in all European languages: Italian doesn't have J or K, and Polish doesn't have V. They're a little unique.
I don't think this applies to any of the bottom 4.