Go back and play those games that were tough when you were a kid and see how easy they are for you now. :P
I've been playing Mega Man 9 today. It... it's not easy. I managed to get through the eight Robot Masters stages and bosses. I've also stumbled my way through most of Wily's Castle, but the third level broke my spirit. And apparently if you stop playing anywhere in Wily's Castle, you have to start over. Just like the good ol' days.