Maybe about five or six years ago, I bought a bunch of pansies on sale in order to fill in some holes in the flowerbeds. Surprisingly enough, though annuals, they keep coming up year after year (albeit in different areas around the house).
This guy has taken a liking to the candytuft it seems, as he's been showing up there each spring for quite a while now.
I like it when things keep coming back every year, though by rights they don't have to. It makes me feel as thought I'm doing something right (or at least not so wrong).