The only thing I can really think of as particularly pretentious Involving immortal is that photoshoot with Abbath scowling and adopting Rodin poses, sans corpsepaint and spikes, and sitting around a whopping great memorial to Edvard Grieg. Apart from that, I think that, based mainly on the video interviews I've seen, Immortal were mostly about getting drunk, dressing up like retarded orcs and singing kick-ass songs about the ALL DEVOURING FROSTFIRE DEMONSTORMS OF THE ULTIMATE CRYPTIC WINTERNOOOOOORTH.
I mean, in one interview, Abbath is asked to define black metal, and he stares at the camera very intently, obviously extremely drunk, and starts ticking off points on his fingers:
"Spiiiikes, leather...corpse paint...pine forests....*vaguely clasps at his arms and waves his hands up* armour...and spiiikes...cold...uhr..."
Then Horgh leans in to shot and says in a helpful tone of voice
"Norvay"
"JA! Norvay...and cold...winter...*more hand gestures* pine forests! *makes motions on his face* war paint! Evil! Yeah."
Man, I fucking love Immortal. So good.
*goes off and listens to 'Against the Tide (in the Arctic World)'*