Main character looks pretty interesting.. I'm pretty excited! The JP fans have nicknamed him Potter-kun.
I saw it and I'm still not really hyped for Persona 5 at all. I just don't get hyped until a game is really close to release and we don't even have a date for this. We also have seen no gameplay so far and still know almost nothing about the game. Oh well, it's Persona 5. It's probably gonna be an excellent game!
I agree with Narukami, there are no gameplay videos yet so it's too early to have an opinion on the game itself. Judging from the video it's going to follow the formula of P3/P4, which has too much social sim for me personally. I prefer their predecessors.
I reserve judgement as well until gameplay is shown. It's still early to tell if I'm going to be interested or not. The protagonist being a thief is somewhat interesting.