My deck feeder "pets" are bringing more friends, but they do occasionally fight with each other. I thought I had primarily one Stellar's jay and one douglas squirrel, but I started to suspect that there were two individuals of each, and finally I saw them all together (in a four way very loud thumpy frisky squabble) recently. They're all still very shy if I go out to the deck, but now the jays will peck the railing of our crappy old deck extremely loudly and hop up and down to get my attention if they see me at my computer and there aren't peanuts in the shell available, and the squirrels will come right up to the door (it's a glass paneled French door) and do the laser pew pew pew call at me to put out more too. If they don't see me at the dining room table (where I use my laptop), they'll hop/fly/scamper all around the windows in the upstairs living room looking for someone to scream at. They are super fun and relaxing to watch (even when they're making a racket), along with all of the fat little finches and chickadees and juncos. 
We can't have bird feeders on the ground, because we have bears. So I didn't put out any kind of wild bird/squirrel feeding stuff for a long time, but I'm really enjoying it this year. I'm sure all my neighbors are wondering where the fuck all the peanuts/peanut shells are coming from if they do yard maintenance though. 