Graphical achievment works in different ways.
For example a 16 colour game compared to a 32 colour game, developers sometimes sacrifised graphics for speed and gameplay!
saying x looks better than y simply because y only uses 16 cols and doesn't looks so good (Xenon2, Gods both 16 cols) is like comparing AGA to ECS (main diff is num of colours!)
Darkseed ( http://hol.abime.net/?id=273
)looked excellent, but the interlace gfx give me a bloody headache after 5 minutes
Games which stand out to me are the usuals, Turrican2, Gods (http://hol.abime.net/?id=2754
), Pinball Illusions( http://hol.abime.net/?id=1059
), Slamtilt ( http://hol.abime.net/?id=1972
), Settlers ( http://hol.abime.net/?id=1878
)etc.. but the best I think is Flashback..
The amount of effort that would have gone into making it look the way it does must deserve credit, all the acting/rotscoping etc, the game plays smoothly and fluidly, the backdrops of the various locations are simply gorgeous etc...
Flink on CD32 looked good also!