I cannot tell you about timnehs. I can tell you about Edgar, but he is quite special. Why is he special? Because each bird is special, unique. Each bird has his/hers own personality.
Edgar is quite calm bird. Not very loud, not very aggresive, except... when he is aggresive (like now when he is hormonal).
He is scared of few things, like colorful, big toys. Or sometimes colorful small toys. Or new things I would never think could scare him. And sometimes I try to introduce a new thing very slowly, and it quickly appears that Edgar is not scared at all.
And sometimes he can get scared of something he already knows (like the sound of me closing the drawer). It doesn't mean he gets scared easily. It means that I never know what might scare him. That's why I would never dare to free fly him.
He is very receptive to our training sessions. I can tell he likes them. Not always, but most of the times and I believe those training sessions are necessary for his entertainment and mental development.
He bites. Not very often and usually he gives several warnings before. But sometimes he just bites - when he is angry, hormonal, surprised. He doesn't use his full strength though.
Usually he doesn't like when I do something and not pay attention to him. He wants to do this with me. He wouldn't let me talk through the phone (he thinks phone is his and tries to take it out of my hand), he wouldn't let me crochet (crochet is his just like the phone), he doesn't like when I use computer mouse (his as well) and a keyboard (gues what... his). I have to put him in the cage when I need to work. But when in the cage Edgar is calm and patiently waits for me to get him out.
So to summarize: he requires a lot of attention, patience and early training (I can see what huge benefits I get just because I started to train him from the very beginning - I got him when he was 6 months old and started to train him the second day he was with me)