good grief - no, not heavy metal - although certainly guilty of having spawned g** knows how many shite bands, who have almost all taken exclusively superficial elements without understanding the group's musical influences and intentions imo.
there's (heavy) rock / funk / folk and 'world' too, even a jazzy feel at times on certain Page solos, with no compromises in terms of commercial considerations, or marketing agenda.
Despite the Stairway stigma (and controversy: hello Spirit ;-) ), IV is probably their most consistent and condensed 'statement'.
Great stuff on all the albums (inc. Presence 'for your life' 'royal orleans' , and even 'in through the out door' with 'Fool in the rain' ...).
Physical Graffiti has arguably the best highs (and worst lows - in my time of dying etc) with something like 'in the light' with it's glorious canon (as in Pachelbel [now spelt correctly
]) arrangement of the main ascending guitar parts in what passes for it's chorus, underlining the band's uniqueness - and always 'tight but loose' ...
and ...
a) don't know why I've written this, as I've pretty much decided never to listen to them again due to other, non-musical, considerations
and
b) the OP has decided he doesn't like 'em already