Farres said:
I don't want to stuck in family hotel or something like that and I prefer hiphop, techno and rock music
First things first... techno is a very specific form of music. If you're using that term in the sense that some people I know back home in the States use it, stop it. Stop it now! Don't use the word "electronica" either. Techno is just one of the genres of electronic dance music, which also include house, trance, breaks and tons of sub-genres, cross-overs, etc. Check out this website for a primer:
http://www.ishkur.com/music/#
Now, if you're going to be attending the big parties at the big clubs, you're going to be hearing mostly house, techno and/or trance, depending on the party. There are only a couple of parties at the major clubs that feature r&B and hip-hop (though Pacha was often playing it on their second dance floor last year). I think staying in Playa den Bossa is best for this kind of lifestyle, though Figueretas, Ibiza, Talamanca and San Antonio all also work.
If you aren't bothered about attending the big nightclub parties, stay in San Antonio or the nearby San Antonio Bay area. There's a neighborhood in San Antonio called the West End which has a high concentration of smaller clubs that cater to all different music tastes. Stephen, when not joking around, can help you out with the names of some good live music clubs around the island.
I highly recommend reading the clubbing guide and accomodations section of the main Ibiza-Spotlight.com site, then get back to us with more specific questions
(and you moderators... big help you are! fellatio, indeed!

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