So last year, a close friend of mine had to rehome her parrot, and I was lucky/blessed enough to be able to offer him a home!
Needless to say, life hasn't been the same since... but in a good way.
He is a very good grounding "tool" for me... not just because he responds to me vocally, but because he requires about the same level of intellectual care/stimulation as a 4 or 5 year old child. I've been learning a lot about that... teaching him words and phrases, making games for him to play, creating toys for him to play with, etc.
I definitely wouldn't say he's a "therapy animal" at least in the typical sense, because he picks up on how I feel and will mirror it back to me... which is not good when I'm angry or upset... but it's good because it provides me with that mirror, and will be able to change my actions accordingly, even if it means going to take a "timeout" for a bit to calm self down or similar. So in that sense, he is a therapy animal.
I'd always wanted a bird, but I didn't think it would ever happen -- at least, not for awhile -- because the start-up costs are fairly steep. But I am so thankful that I was able to give him a new home -- I helped my friend out, cuz she's able to check in with me and see how he's doing, but I also had the chance to adopt a bird without having to pay a huge lot for a good cage, etc. And he's been a good companion so far.