I enjoy music for two separate yet not completely independent reasons.
Detail and ambiance.
Detail being the general texture and layout of the song, be it hypnotically simplistic or awe-inspiringly complicated. Ambiance being the emotional "color" of the song, if you will.
Obviously, one affects the other, to varying degrees.
I tend to listen to music based on how I feel at the moment, rarely if ever does music change my mood, other than making me vaguely annoyed if I hate it and am forced to listen to it.
I abhor talentless, uncreative music, though not necessarily mainstream music, as many of the bands I enjoy have had great commercial and critical success.
In the end, the modern "indie" movement annoys me just as much as the people who listen to terrible pop music... Nobody is impressed with your intellect based on the awesome "underground" bands you listen to, folks. -_-
Though there are styles and genres I hate, I don't think that musical preference works predictably as any sort of barometer of a person's intelligence or maturity. I consider rap/hip-hop to be largely stupid and immature music, yet I know many individuals far smarter and more mature than myself who listen to it almost exclusively.
Most of my favorite bands are metal bands, though I probably wouldn't qualify myself as a metalhead. I like weird, experimental, progressive music, music which leaves a lot to be analyzed, and to that end most of the bands I've found which fit the bill happen to be metal bands.
Favorites of late:
Devin Townsend, both his solo work (progressive metal, alternative, pop/jazz fusion) and his work with the band
Strapping Young Lad (industrial/extreme metal)
Fear Factory (industrial metal, love their cold agressive sound mixed with the sci-fi lyrical concepts)
Gojira (this band fits various sub-genres of metal, even within a single album; their music also strikes me as be extremely XXFX orient, lyrically)
Korn (dark alternative metal, simplistic and derives most of it's power from raw emotion, really loved their earlier albums)
Meshuggah (insane progressive metal, indescribably complicated yet pattern based and logical, have to hear it to understand, this band blows my mind and I consider them to be the most important metal band in existence)
Tool (alternative metal, "trippy", very introspective, feels like kind of a neutral ground between F and T...)
Others worth a mention:
Porcupine Tree
Ministry (the album
Twitch is classic industrial, everything else they've done sucks major wang, though)
Primus
Alice in Chains (loved
Dirt)
Slayer
Deadsy
Sergei Rachmaninoff (don't listen to much classical, but, love this guy's work)
Dave Brubeck (listen to very little jazz, but the bebop compositions by Brubeck are always easy on my ear)
I would theorize that F's enjoy music which strikes a certain emotional chord in them, while T's like complex and detailed instrumentation or lyrics.
But, this mold rarely seems to work.
I have an ENTP friend who listens largely to atrocious 60's/70's pop music and acoustic blues, and most of the INFPs I've met like prog. metal a lot.
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