I have always failed to appreciate detail in animations, once it surpasses what's acceptable by standard. I appreciate the story, and atmosphere, much more than the epically well drawn eyelashes in one minute shot that, overall, gives very little importance to the complete production.
I actually like the older animes (nostalgic memories). If I see Kickers, Little Women and Dragonballs (season 1) I feel like a kid again. Especially the older episodes of Pokemon (season 1-3), I love their humor and emotional scenes. Now they focus too much on the fights to me. Of course I like the new animes too but they don't feel the same.
I think I misunderstood the question. I answered yes to Anime with simpler characters and basic plot-line because it allows you to dive into the universe and discover more details through the character's interactions.
To me, detailed is like Final Fantasy, because although I've never played anything besides KH, The Characters seem to have overly detailed costumes, back-stories and designs that can give the player or fan information overload.
When its detailed you can only enjoy what's there, while when its simple, you can dig deeper into it and find things that relate to you more, I think.
But now I'm going more with "It doesn't matter." As long as the story and characters are balanced in a way that interests the viewers, you can go both ways.
I don't care either way. Detailed anime like the Fullmetal Alchemist series (original and Brotherhood) have a great art style and story to keep me gripped to the TV, while Shin Chan was loosely-drawn and has a cartoony, simple style but the humor keeps me addicted... in a guilty sort of way.
I mostly gear towards story when it comes to anime. Doesn't matter how it looks... mostly.
For some reason, I kind of like the older, simpler anime like Ranma/Sailor Moon style, but not so far back as the Maison Ikkoku era, where it was like 5 frames per second, and even the most detailed characters looked pretty lousy. (And yet, I like the original Gundam, but that was probably an exceptional exception(?).)
Not that I hate detailed anime, because I still like quite a few of the newer ones(well, new as in 1995~2005-ish). But I just don't think that higher [i]graphical[/i] quality in anime is all that interesting or necessary, and half the time it gets stuck onto stories and presentations that just aren't all that good anyway.