Out of all the options, I choose Rock. If it weren't for Rock, there would be no Metal, Heavy Metal, Death Metal, Alternative, Punk, ETC.

And let's just be honest, there are WAY better and more famous bands in the Rock genre who will actually be REMEMBERED years from now, unlike some Metal and Heavy metal bands.
I don't like Metal. I don't know how people can go about listening to excessive screaming, constant and pointless guitar rifts and songs that they can't understand half of what the guy is saying.
Only kind of Metal genre I tolerate is Nu-Metal, Power Metal, Parody Death Metal (Dethklok) and Progressive Metal. Everything else is trash in my opinion. :3
I'm the only person who lines jazz... :O
That's because you are probably some of the few here who REALLY listens to a genre worthy of being called "music". :]
P.S: You shouldn't have made 'Rap' an option, but 'Hip-Hop'. People rap in hip hop, but recently people have been calling Rap a genre itself. XP