I'm not sure how weird it is to answer my own question when I'm the one who set the parameters but who cares.

I'd probably choose flight, because walking is a bit of a painful business for me so if I could get around without using my joints and muscles, that'd be great. Also could reach more than just the two lowest shelves in the kitchen.

Telekinesis would be nice, but I'd be so annoyed for always missing, that I'd probably never use it. My aim is terrible as it is, if I try to throw a piece of paper in the trash, it's more often than not on the floor even if I was standing right next to the bin.

I don't know if invisibility would cure me of my anxiety to go outside. If it helped with that, it'd be cool, but I somehow don't think it'd be that easy. I wouldn't mind the time limit though. Four hours of visibility would be plenty, I'd use it when I'm with family.

Extra limbs! I wouldn't mind a pair of raccoon arms. Or cheetah legs! But flight would still probably be more useful.

Invulnerability would be a nice upgrade. My skin's very fragile and I seem to be getting cuts if I just look at my hands too intently, but I think the clumsiness would be just annoying as the poor aim in telekinesis. Especially since my problems with proprioception already make me quite clumsy. Don't wanna add to that. Although, if invulnerability cured all my existing illnesses and would also make me invulnerable to mental hurts, that'd be quite something and would probably make me choose it over flight.