totally agree with the RHCP example - john frusciante & flea have great chemistry, excellent use of restraint & powerful grooves. sometimes they tend to indulge a bit much for my tastes, but it's never less than interesting & always tasteful.
not much of a fan of post-rock, it's completely & totally boring to me actually. i've always been a lyric man, anyhow.
There are times I tend to dulge in lyrics, and others when I'm just over taken by the force of the music itself... I enjoy classical music a bit, so post-rock is sort of a common ground between rock and symphonic. And I just find Sigur Rós' music to be some of the most beautiful to grace my ears.
But... uh... Yeah... Dylan. I think I mostly prefer the abstract period, as Mick put it. Highway 61, Blonde on Blonde... There's just too much to list or get into.