OCS: Arte/Sanity
AGA: ufff I don't know I like a lot of them, for example Tint/TBL, Phase One/Capsule, Lapsuus/Maturefurk... and I can't remember the name of many of other demos I liked...
But I find some well known demos boring: When we Ride Our Enemies/Skarla (for me it's nothing but a nice engine) Alien (I can't remember the group, but it's the same, a 3d engine and that's all)
and intros also: The castle/loonies...
well, in peecee it's very common for example i've seen an intro called das product/fr8 or something similar, it's technically amazing because it packs a lot of istuff in 64kb, but it's booooooring. I prefer others like 7 heaven, they are worse technically but I prefer them.