Im a big fan of the flying family's so much.
Pidgey, Pidgeotto, and Pidgeot - Classic's. They've been in our hearts right next to the first starters. When you first run into Route 1, and run into a Pidgey. I get the feeling of excitement, and run from the battle, to not hurt the pokemon.
Hoothoot, Noctowl - Owls = win... I always think they should Dark/Flying pokemon, because I always use Noctowl for my teams in 2nd generation.
Tailow/Swellow - I think they just redid Spearow, and gave him a diffrent evolution. There my least-favorite two bird pokemon for the generation.
Starly/Staravia/Staraptor - I love these ones alot, but there not my favorite. The fourth generation showed us the beginning of amazing bird moves, which I was like " HECK YEAH!! "
Pidove/Tranquill/[whatever the third one is] - I like these untill it gets to the final evolution. I hate that pink thing on the males face. It makes me want to just look around for the female just so I can get a non-pinkfaced one. I still like them.
If they have Washibon-Rufflet/Wargle-Braviary, I would vote for it in a heartbeat, but I went with Noctowl. Staraptor was close tho