new tanks are a blast Thats why I like helping other people set them up so I can live vicariously through them instead of sinking my house in more tanks haha.
Anyway...most fish love having places to hide. For angelfish and livebearers they generally prefer plants over rocks and decorations on the bottom of the tank. Bottom feeders (like your pleco) will most likely want to have somewhere dark to hide, as most of them are noctournal...so a driftwood cave would be awesome if you could find some driftwood? SOME of the decoration is for you...but a lot of fish feel more secure when they have places to hide, so you'll actually see them out and about more often the more secure that they feel.
For more decoration ideas you could go check out the "rate my tank" forum and check out people's tank pictures that they've put up.
Anyway...most fish love having places to hide. For angelfish and livebearers they generally prefer plants over rocks and decorations on the bottom of the tank. Bottom feeders (like your pleco) will most likely want to have somewhere dark to hide, as most of them are noctournal...so a driftwood cave would be awesome if you could find some driftwood? SOME of the decoration is for you...but a lot of fish feel more secure when they have places to hide, so you'll actually see them out and about more often the more secure that they feel.
For more decoration ideas you could go check out the "rate my tank" forum and check out people's tank pictures that they've put up.