I found my current T on google. Seriously. Googled therapist + city, discarded all the therapists I know (the result of several years of volunteer work in mental health organisation in a small city, where losts of the to be therapists volunteered too), looked through what was left and picked a lady who's photo was the most human (not passport style, no obvious photoshop) and webpage most normal (short and full information).
She's my 2nd T, the first one was from the organisation I used to work at, and my ex-boss, so yeah, it wasn't a good idea to see her
I realised the current T is a match within like 10 minutes after meeting her.
Qualities? I have no idea, I guess that's different for different people and different issues. For me it's... ok, I seriously have no idea, lol lol