Clever. Funny. Mischievous. Curious. Observant of what you are doing. Seem to want to be involved. Can be snuggly. And a lot of fun.
Although my 30 year old female Tootsie can be hard on the ears because her volume knob broke stuck on 11 a few years ago they generally don't seem to make an obnoxious amount of noise most of the time. When she goes off, the much younger male Rosco copies with a lot of "Me too! Me too! (what are we squawking about?) Me too! Me too!". I think he would be a lot quieter as a solo bird.
The only time that Rosco initiates a lot of noise is when he is playing tattletale on my senegal Sidney when he is doing something naughty. Rosco watches out for him and starts sounding a trumpeting call to get my attention. He is my 'watch bird' and pretty darn effective at it.
I would certainly recommend a blue crown as a good bird for adoption.