This -had- to be the first topic I sought out. Hallo
I think I could be considered obsessed. I have always responded to music, and can remember being a wee girl of oh, maybe 4, and being obsessed with the Beatles, the song Hey Jude in particular. I have also sung since a child, since as far back as I can remember. I think I sang more than I talked. I can express things through song far, far better than I can through speech, and maybe even writing. I compose, and also record my own a capella's, and want to learn production better but I am always a bit daunted as ADHD makes it really difficult. I love DAWs, so much potential. I can make sounds in tune with various instruments, but have not had access to any for long enough to have proficiency. I want a piano most of all. Perhaps a midi controller one day. I had some instruments but had to sell them when I've moved. Anyway, I digress. Heh. The sad part is that I seem to cycle through 'media' and sometimes I will just be overwhelmed with music perhaps, and need a break, so I'll dive into some show like Walking Dead or something, and marathon through it a couple of times. Or I'll get into a book phase. Or a movie phase. Or a gaming phase. Who knows why.

But I always come back and my musical absences are never very long usually.
I -really- admire those of you who can build things like instruments, and construct speakers and such things.
For genres/artists, I like (but am not limited, I'll likely forget many and sorry for the jumble, I should have organized better but I get kind of goofy and excited about tunes):
Lately, been listening to a lot of ragga, dancehall, and jungle, as well as ambient, downtempo and IDM. Although right this second I'm listening to Death Grips which isn't any of those things. I'm into turntablism, scratching, mixing. Would love to be able to do it but haven't had the opportunity.
I've devoured the following genres and often have nostalgic moods where I will listen again to: metal (but not the mainstream kind except for a couple of bands such as Black Sabbath or Anthrax), industrial including Nettwerk artists c.90s such as Severed Heads, and Front 242, Front Line Assembly, Ministry, TKK, and other genres, goth, 'college rock' (e.g. Smiths, Minutemen, Meat Puppets, Butthole Surfers, that sort of thing, the label SubPop in the 80s/90s), punk/postpunk, new wave, RnB/Soul, especially golden age Motown, world music, garage like The Cramps, Reggae, ska (mostly tone ska revival, stuff like the Specials, the Selecter, the English Beat), house and a little bit of trance, Big Band (very much one of my favorite genres), jungle (I am a junglist and likely always will be), IDM, and last, definitely not least, breaks.
Some techno like Orbital but very picky about techno. If its not really really good, its really really bad, there's no middle ground with techno for me. Ambient house like the Orb (who defined the genre), and a bit of dub. I'm picky about Dubstep, even though I do like some of it. Electronic heavy, but I still appreciate 'analog' music too.
Classical, inc. early music, opera and orchestral. 20's music. Sometimes I'll listen to something like shoegaze, but I won't go too far out of my way to get it, I'll just listen to the odd tune on youtube or something. Or find a shoutcast station that plays it and just put that on for awhile. Also there are artists that stick out that I just hear other places and I like them enough to grab what they've produced, like Josephine Foster, Sam Phillips, Röyksopp, The Postal Service. I like artists like Explosions in the Sky, The Flashbulb, Dntel, the Notwist, José González's solo work as well as his band Junip, Little Dragon, huge aficionado of now deceased Jason Molina and especially his project Songs:Ohia, was brokenhearted when he died not too long ago. Oh, I love Bjork as well as her former band the Sugarcubes, I was listening to them when they were current. She's been with me a long time. 808 State, Autechre, New Order, Underworld. Lauren Hill.
Having said that, -the- prime musical home I've been living in for quite a few years now is Drum and Bass, favorite subgenres would be Darkstep, Techstep, Liquid Funk, Neurofunk, and I also adore downtempo/triphop, ambient, and of course Hiphop (I adore Madlib, Aesop Rock, Nas, and numerous other artists) lounge and chillout, I love other certain genres of jazz, mostly old stuff or trad, Blue Note, Verve, Miles Davis, Billie Holliday, Dave Brubeck, John Coltrane, Charles Mingus, and many others. These are all what I typically listen to regularly. The odd tune by Art Ensemble of Chicago, or Sun Ra for those different moods. I adore Yma Sumac and was quite sad when she died too.
I enjoy a lot of indie ranging the scale, and I've happily discovered that many tv shows have put out some great soundtracks, which is wonderful because a lot of these songs would be forgotten in time had they not been used in these shows and films. I've been enjoying the Breaking Bad soundtrack a lot, although I don't like every song, I do like most of them. I enjoyed the ST to Six Feet Under as well, same deal. And The film the Hunger (oldie), lots of others.