Recommend me some unusual and unique metal

[S<issors]

Nachtmystium-Assasins, Instinct: Decay, Eulogy IV, and Worldfall

fyp

 

[metal_wrath]

Thou Shalt Suffer

 

[Vitor]

impetigo, cripple bastards and the gourishankar

 

[Chairman Kaga]

Behold... The Arctopus
Alestorm
Mithras
Hatebeek
Caninus
Strapping Young Lad
Marty Friedman (later solo work)

 

[Bassman366]

Already named but I recommand too:

Arcuturus
Sleepytime Gorilla Museum
unexpecT
Sigh
Atheist
Behold the Arctopus (More prog metal, good enough)

Other ones:
Stolen Babies
Diablo Swing Orchestra
Ephel Duath
Nekrogoblikon
Age of silence
Augury
Sculptured
Nuclear Rabbit
Carnival In Coal
Sebkha-Chott
Le Grand Guignol
Peccatum
Ram-Zet
Gojira
Samael (maybe)
Vintersorg
Trans-Siberian Orchestra
...And Oceans
Dog Fashion Disco
Kekal
Eluveitie (Strong Folk Metal band)
Genghis Tron
Negativa (Gorguts)
Haggard
Apocalyptica
Jarboe
Jesu
The Kovenant
Morgul
Qntal
Ved Buens Ende
Tub Ring (if you like a bit punk)

 

[wtsdeath]

check out Nuclear Rabbit, I especially like My Girl's Got Guts
Fantomos is also some pretty off the walls experimental shit
Strapping Young Lad has already been mentioned but is quite good

 

[Chairman Kaga]

Should check out the song In Flames by In Flames

 

[TartanLlama]

Where do I begin?
Progressive Stuff:
Andromeda (Favourite band, no-one like them)
Spiral Architect (one of my personal favourites, awesome bassist)
Spastic Ink (Jarzombek pwns all)
Blotted Science (Jarzombek aswell)
Behold...The Arctopus (Total insanity on Nano-Nucelonic Cyborg Summonings)
Direwolf (Really interesting stuff, same guitarist as Arctopus)
Canvas Solaris (Pretty much all-out tech)
Continuo Renacer (Spanish tech-prog outfit)

Death/Goregrind stuff
PsyOpus (Incredible music, shitty annoying vocals)
Gorguts (Listen to them!)
Lynkathea Aflame (Death metal with soul as well as technicality and brutality)
Indricothere (Solo act from the Warr-guitarist of Behold...The Arctopus)

hope this helps