I know they are different roles but I am interested in which one is more fun to play? I played Graves a bit and I liked him, but Vlad seemed also fun to me seeing many of them so which one?

karthus

Gravimir.

they both so much fun

eve

Graves imo. But to be fair I don't find Vlad that fun to play so I'm a little biased.

both are rather boring champs

I find ap less frustrating than carry.

I find Vladimir more fun, but Graves is slightly stronger for his role than Vlad is, so if you solo queue a lot probably Graves.

Vladimir and fun to play, they don't go together.