I both like technicality and heart (good word as any), but I think the latter is most important. I love Mark Knopfler's guitar on songs like "On Every Street", "Speedway at Nazareth" or "Sultans of Swing" (of course). I also absolutely love David Gilmour's steel guitar solo at the end of High Hopes, last track on Pink Floyd's "Division Bell" album from 1994 which, to day's date, is also the last song they wrote.
I think a lot of the shred guys also play stuff with heart in it every now and then. It's just that they get known for their shred and little else. I know Buckethead has some lovely songs (I'll mention "Soothsayer" again as an example) and even twin-axe player Michael Angelo Batio has some hearty stuff on his recorRAB.
edit :
Buckethead's Soothsayer for your listening pleasure, although the sound quality could be better. Give it a few minutes - it gets very good. The heart I'd say is in the solos he starts playing somewhere out there in the song. A good example of mix between excellent technicality and feeling, I think.
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edit :
Oh what the hell, I'll add Buckethead's "For Mom" as well. This poor guy neeRAB to get known for more than his shred-stuff anyways.
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