Long standing favorite is probably the Black Capped Chickadee. It is so friendly and brave and small. I hear they warn others of trouble in the neighborhood and they are the first to return to feeders after trouble has past. There is a place in a park near by where the chickadees are so used to visitors, you can feed them from your hand! In reality, I love them all, especially the first time I see a new bird. I'm training my husband to get excited as I do and he is great to have along now. I don't always find them in the trees very well so having extra eyes is nice too. I recently got the app: BirdNET to help me identify bird songs. It is a favorite of mine now. (I hear Merlin has something like it now.) I helps to know what you are looking for!