Fav. riffs

[Mordor]

Megadeth - almost everything
Death - Symbolic
ACDC - Back in black
Decapitated - The Negation
Black Sabbath - Symptom of the universe
Scorpions - Dynamite
Motorhead - We are the road crew
Alice Cooper - I'm eighteen
Dio - gypsy

and many more..

[Special-K]

Slipknot - Before I Forget is great...
Children Of Bodom - Lake Bodom

[Snow007]

Too many to list but my favourite is COB - Towards Dead End

[khabibissell]

I'm drawing a bit of a blank right now, but I love to break out my Les Paul, crank up my amp and play the intro riff to Shock Me. I can do that for at least 20 minutes straight and be perfectly content. I don't know how anyone else within earshot feels about it though...

I'd say that qualifies as a good riff.