Budgies are loud. I have three. And trust me, they never do shut up *rolls eyes*
But they are very good for sitting on your finger and such, but the males are best. The males are the most friendly. You can teach them to talk if you have one, and only one. Because with three, it would take you ages. with 2 you can usually teach them to whistle. Females bite. Males nibble.
Budgies tweet and Squawk but are overally little cuties. Get a colour you like, because you watch them a lot. Be sure to get a cage that is big enough for them to fly around it, and give them free flight time (flying around a room) for at least 1 hour a week (best to be more). Be sure that their bars on their cage aren't wide enough to let them squeeze their bodies through (it hapeneded to me).
And Tame them right when you get them.