It's striking how much a little organization can make a sim much nicer looking than another. Walkways, landscaping flourishes, a small application of these seem to make a sim full of rentals look much nicer than one that is just cut up into pieces and sold for tier without regard to the aesthetics of the environment around the parcels.
SKIMI Central has a handful of rental plots, and a mall with a fairly pleasing appearance. Most of the stores in the sim have an art gallery motif to them, with wood floors, and there are Koi ponds strewn all over. The mall itself has a wide variety of products, mostly involving buildings and landscaping.

When I see nice builds, I always feel disappointed, because it seems like there's never anyone around. A nice sim is a lot nicer with people milling around, checking things out. After all, nobody would want a virtual world without other people in it.

The courtyard area has an accurate, working analog clock. The street lamps use a very slight use of particles for the glow from the lamp -- rather than glow from basic shaders. This means even if you're using a client with no shaders turned on (like I am at the moment), they still look great.

And of course, the lamps turn off with the sun rises, as they should. This is an assumed feature in any serious lamp by now, but I still appreciate it, and it's one of those little things that keeps me coming back to Second Life, and the great builds I find.