Hey! I'm 14 and I have a GCC and a parrotlet (who is untamed). Peanut was my first bird, and I have to say she's amazing. Currently she's on my shoulder preening. GCC's *are* quieter than other conures- those sun conures at petsmart are really loud compared to Peanut. She talks and mutters and gets along with almost everybody (brother excluded).
I would go with a green cheek though. The parrotlet we may give back to the breeder- I'm worried that she might start plucking and that she'll never get used to us. I know parrotlets are cute (so small! <3 ) but I've heard an owner call them 4-ounce pit bulls. They can get really mean and territorial sometimes.
I don't know who said it, but Linnies (Lineolated Parakeets) are a bit rare but are very sweet. We're planning on getting a linnie instead of the plet- the plet will go back to her former owner (don't worry, he said he would take her back). Anyways, linnies are a little smaller than a GCC, but they're very social and can talk (cute video of one talking-
http://www.youtube.com/watch?v=3rmvPZBOFk8 ).
So... that's all I have to say. xD Good luck with your new bird, me and my mom are the 'bird side' of the family too.

(My dad likes Peanut and my brother doesn't care much.)