Watching the birds on the bird-feeders in the garden. I get a good mix of finches and their colours are great - not up there with tropical parrots or exotic waterfowl but still a joy to see.
I support a British charity called something like 'Save Our Songbirds' - £25 a year. It's money well spent. Also, Sainsburys let you order foods for wildbirds and get them delivered with your groceries so that's handy - keeps my 'wild pets' happy, keeps me happy :-)