When I was a kid, I liked birds, and really rarely saw anything but starlings and English house sparrows in my very urban world. Both have become relatively uncommon here, as native birds surged back once we had some environmental regulations, and the invasives have fallen back quite a bit. I like starlings, but my gang are the local crows, who are very smart birds indeed.
I watched an epic battle between a pair of crows defending their young and an American Eagle on a raid a couple of years ago, and that was courage. The crows were badly injured, but won, and I worked at getting good food to them while they recovered from some nasty talon gashes. I don't like to interfere with the wild world, but after what they'd done, I didn't want their young to starve with the injuries to the parents slowing them down. Once the scars were covered in feathers, I cut back to nothing, but the crows are still around a few years on, and often check me out.
I have local chickadees that will land on my hand. And I've been using the Merlin app from Cornell University to identify birds by their song. It's been an eye opener, even if my opened eyes haven't done much. I'm surrounded by small songbirds I rarely see. Sometimes the app has picked up 4 or 5 tiny species I would not have known were there if I had counted on visual identification. Birds are air fishes and we're just awkward beasts that lumber along on the bottom, unable to swim like the quick ones.
As for feeder foods, in the winter I go with volume. I can fill the feeder every few days for the birds that overwinter.