I've seen both House Wrens and Carolina Wrens in the yard before but they never move into my wren houses. We have a lot of feral cats here so I think that keeps them from nesting. Only thing I ever get in any of my houses are sparrows, lots of sparrows.
Birds are definitely our thing, we've pretty built the backyard around the feeders. My favorite thing is to sit on the patio and watch the birds, I could do that all day. I keep track of the birds I see and so far I've seen 32 species from the patio with the high of 21 different species in one day. No hummingbirds this year though, that is extremely odd. Don't know why.