Hmmm, I don't live in either but I have friends in TC so I'll do a little extrapolating of what I know...
I think TC is more social, lots of events and they seem interconnected between the blocks, nice RAs that look out for you
Mason has Made in Mason nights out and they seem a rowdy bunch on freshers nights out
Maple Bank (MY HALLS BEST HALLS OK) are so close, everyone loves each other and helps out, amaze pres and nights out, fundraising events too - we had bucket shaking at Bristol with a night out and meal out for £7!
Aitken I'm sure are lovely... but I don't see much of them... I don't actually know where their hall is even though it's on the Vale, but I'm sure they're just the same as us
Liberty Close/Garden/Court are so far away! I know people who live there and the distance from campus is the biggest negative.
IQ is in Five Ways, and I have one friend from there, again nice but farrrrrr
Shackleton is just above the Hub on the Vale, literally has everything you need, I think they're really good for socials and things like that
Selly Oak is a bit rough but it has take aways and Aldi and Lidl and train station and everything and it's cheap and really sociable, please don't feel if you end up in Selly you're missing out. You're also 5-10mins from campus so you're laughing at people on the Vale
Basically wherever you go, you'll find people you like and events to go out on, and please ignore my bias toward Maple
I think that's all the accommodation options? If I missed one out please say and I'll tell you about that one too, haha