1. Leusemia
Well you can read the bio for info about this one (I wrote it), this has been my favorite band for years, I pretty much have almost all of their original albums, and this is the band that got me into progressive rock.
A friend of mine in High school told me to listen to their 2nd album (which isn't progressive) and well I've been listening to them since then.
Recommended album: Hospicios.
2. Pearl Jam
Another band that I got into in High school, thanks to the same friend who recommended me Leusemia.
Favorite album: No Code.
3. Primus
And yet another band I discovered in High school years, the first one I listened was Antipop which I really liked (and still like), but didn't got me too much into Primus, it would be in recent years that I would like it more and there you have it on my top 3 (even tough I like some other bands more).
4. Daniel F
Leusemia's singer and front man, his solo music is pretty different to Leusemia, but even so I love it.
Favorite album: Memorias desde Vesania.
5. Rafo Raez
A guy who never stops experimenting and well his albums are kind of unpredictable since he doesn't like to do the same thing on every album, good composer and good singer.
6. King Crimson
I discovered this one recently, some months ago maybe, and I got in love with this band instantly, 21st Century Schizoid Man is a good way to start knowing a band you know.
7. Red Hot Chili Peppers
Well since this band is heavily played in radios and tv everywhere is hard not to know them, but well my favorite songs are on their kind of early albums (from The Uplift Mofo Party Plan to the next ones) even tough I love most of them.
I got into those albums thanks to the same friend mentioned in previous lines xD
Favorite album: Mother's Milk.
8. The Beatles
Another band that is impossible not to know them, and I just listenned to their discography recently, because I just didn't want to know the hits, good music there.
Favorite album: Sgt. Pepper's Lonely Hearts Club Band.
9. Iron Maiden
Well another band that it's kind of hard not to know them, and a really fucking great one, I got to know them in High school years thanks to a friend that was like 3 years younger than me maybe, didn't got into it at that time since I was recently getting into rock music, now after a lot of years this band is growing on me and I'm gonna see them live next year =D.
Btw they were in like top 23 three days ago xD amazing.
Favorite album: Powerslave.
10. The Smashing Pumpkins
Not too much to say about them, I just like their music a lot and they're pretty much a great band, but not a fan.
11. Rafo Raez y los Paranoias
Rafo Raez' recorded an album with their touring musicians and made a great debut album and their second one was pretty good too.
12. Therion
Got into this one recently, I always saw their name in other people's charts, so I got curious about them and well... I loved them, I like both of their styles but I like their symphonic stuff better.
Favorite album: Theli.
13. Reincidentes
A spanish friend told me about this one, he made me listen to their song
14. Pink Floyd
If you like progressive rock/music is impossible not to know them, with that said, they're just simply awesome.
15. Tool
Another one I knew about when I was in High school, I first heard
Favorite album: Ænima.
16. Kreator
Well Thrash metal is one of my favorites metal sub-genres, so listening to these guys was a must, but they're this high just because their discography is a really long one, good stuff anyway to anyone who likes Thrash metal.
17. Vintersorg
Pokemare recommended me this one since he knew I'm into prog stuff, even tough he doesn't like them xD and I'm very thankful he did, is a great prog metal band (a loud one I must say).
Favorite album: Solens rötter.
18. Genesis
Another must listen for every prog fan, Peter Gabriel's era is pretty much what I only like about them, even tough I like their first album from the Collins era (And Then There Were Three), hope I'm not mistaken about this one being the first :P).
Even with that said, I love the song
Favorite album: Selling England By The Pound.
19. Slayer
Great fucking band! Like their classic stuff more than the new one, even tough I like their Christ Illusion.
Recommended album: Every album except God Hates Us All and Diabolus in musica.
20. Turbopótamos
An interesting band that mixes ska with rockabilly, they call it skabilly, I like this band but probably is going down on my charts :P
Well... that's it for today @_@, I was gonna make this list a top 50 one but I got lazy~