I want to start playing guitar again, I quit a couple of months ago. The point is I just dont know what to sing, I'd prefer something not easy, but not hard, some blues or solo, no rithym. I've been playing guitar for 1 year or so, so I'm not advanced. Maybe you could recommend me something.

You could start out just playing classics rock songs.Or maybe playing metal stuff. Just basically find out what you are into. Neo-classical metal will take some time to develop that style. You just have to start out slowly. I recommend watching any video and instructional video you can get your hand on.
Here's a youtube page.
http://www.youtube.com/user/AngeliteriuM1

Also if you're looking for neoclassical guitarist. Check out some of these guys.
http://neoclassicalmetal.org/index.php?showtopic=970

I recommend you picking up this book.
Hal Leonard Guitar Method: Bound Together in One Easy-to-Use Volume
It's great for beginners.

Also, mostly important find your motivation. If you had someone that motivates you and you look up to, you'll keep playing the guitar.

I am into many styles of music ( rock of course ). I'd really enjoy relaxing with some blues, some good guitar solos, and of course some crazy metal riffs. The bad part is, my guitar really really sucks, I bought it in september last year as a promotional package at 400$. It's a Marshall Rock Kit which includes a Marshall Guitar and a Marshall MGCDR-15 and some other stuff. Before that, I had an acoustig Stagg that I enjoyed pretty much. The thing is the distortion sounds really bad, but I can play on clean pretty decent. But hey, I said that its a good guitar for a begginer like me so I took it. But the next guitar I'm gonna buy when I advance a little bit, I wish to be a Les Paul ( Epiphone or Gibson ) or ESP.
Another bad thing is that I don't think im gonna have much time this year to play the guitar ( maybe 2-3 hours per day ) cause I've got some final exams.
As for motivation, I would really enjoy to make my own band, and maybe make a career in music ( I know, only dreams ).

I got fortunate. I got my first guitar free (like yours it's really bad) and an Ibanez free. For your guitar, don't be scared to change stuff on it. Try changing the bridge unless you like yours (trust me floating bridges are a pain) and also look into some pickups. They change your tone alot. I just got my Ibanez back from the shop and played it on this cheap amp and wow the tone was crazy and I thought my amp sucked alot.

For the practicing,
I can quote,
"It's better to practice for at least 30 minutes a day than practice 3 hours every four days."
So don't worry. I get a lot of homework but I always fit in at least 30 minutes to play my guitar.

Also, for listening to various styles of music. Turn your radio to channels that don't play rock or pop or rap, like classical and jazz stuff. They're really inspiring.

Hoped I helped :).

By the way, this book you are talking about. Are you sure its the right book to take me from begginer to advanced ? Cause nowdays there are many so called books or dvd's that promise the same thing "We're gonna take you from begginer to pro".

Of course it's not gonna really turn you into a pro in like a year. But it'll get you on the right track. But it'll teach you how to read music and teach you some theory. I completely recommend it.
Though, it has an older version and I like that version better because it doesn't have tabs but I do like the layout.

Berklee School Of Arts have guitar books. Check out those.

Oh yea, havent recommended me any songs that I can play :)

If you're interested in theory, I'd recommend Mark Harrison's Contemporary Music Theory 1, 2 and 3, respectively.

You can find everything else technique-wise on the internet with ease, but finding a source for precise theory is a lot more difficult.

Try some stuff from Satriani's Surfing with the Alien album.

http://www.youtube.com/watch?v=XTfdemiG1qI&feature=related

The good thing is there are tons of good lessons on the songs on there. Try to keep the tempo right though. That's one thing beginners might not notice. That book I mentioned talks about timing, meters, etc.

I overlooked the motivation thing. I can say this dreams can be accomplished. If you wanna make a career in music, check out music colleges like Musicians institute(formally named GIT) . The only thing is a college like that is for people who know a decent knowledge of theory and is pretty good at guitar.

Acousolysis,
thanks for the suggestion, man. I might pick up that book. Though I might not need it since I'm in a theory class right now.