Generation 1 would like to have a word with you.Hyper Beam and variants, which, no matter what, are treated like they are the best moves by the NPCs in any game
Seriously though I think they are pretty cool. Certainly they don't have much competetive use but it's a strong move with a nasty side effect so people need to learn to use it carefully which is pretty cool. Also blasting your opponent with a beam of superawesomepowerness is cool.