I dunno, when it was released in 2001, it really left quite an impression on me. This was before any of the "Team ICO Hype" had appeared and the game was a relatively unknown quantity. I definitely think it's more inspired than PoP - Sands of Time (which is definitely a good game as well).
When did you first play it?
One thing to add to the mix was the audio/video impact of its day. In 2001, there were no games available on any platform sporting the type of lighting present in ICO. It was quite impressive for its day and would be lost if one were to play it for the first time these days.
Played it right when it came out. Yeah it had some interesting visual effects going on but it came at a huge cost of rendering resolution-I remember the game being a bit of a mess in that regard.
I thought it looked "cool" but it didn't look great.
Yeah, the resolution was low. It ran in field rendered mode, but at 30 fps so the effective resolution was 640x224.
It wasn't great, but back then, it looked decent on SDTVs. Many PS2 games using that technique ran at 60 fps and ended up with severe flicker (would quickly alternate 640x224 fields between odd and even scanlines to create 640x448). ICO had a more solid appearance that looked good back then. It scales absolutely horribly, however.
The hand animated characters, brilliant lighting, immense scale, and great art direction really stood out. There really wasn't anything like it at that point and it was definitely one of those games which finally demonstrated what the PS2 could do (which was a lot back in 2001).