I find something beautiful about books:
I usually notice them in rooms, those Christopher Hitchens which someone linked a short time ago, I didnt watch them but I noticed stacks of books in the background.
I think that symmetary and what has been said about human beauty already is true, I think my personal aesthetic besides books, is to do with what appears to be natural, untainted or free of additives or anything like that or things which highlight the natural. I'm also a sort of minimalist.
So my ideal could be a Zen garden or forests and green pastures. I love the garden cities or academies in the Final Fantasy games, I love their aesthetic too, if there's got to be high rise modernism or futurism then they can translate it into reality.
There's also a complete beauty to slow, its difficult to really describe what I'm talking about here but when I've visited central European countries they can do this, the english speaking world can not. Also I think there's something beautiful or appreciable about socially conscious behaviour or ettiquette, good manners or honour, the Japanese Tea or Ethiopian Coffee ceremonials for instance.
Happiness also is beautiful, to see others having a good time or enjoying life or accomplishing things, the athlete who has won the race, the lottery winners or much more mundane things like children on their birthdays or at christmas time. Those sorts of things.