Draconic: esoteric bloodline lets a sorcerer gain some spells off the psychic's spell list, provided they arent on the sorcerer spell list, but at the cost of your bloodline arcana.
What spells could I gain that would make it worth it, compared to taking a chromatic/metallic bloodline?
Etheric shards is one of the best battlefield control spells around. Id Insinuation II+ is a good (if mind-affecting) way of taking enemies out, as is oneiric horror, and placebo effect is a way of getting your friends back in the game which targets enough conditions that it's worth it for a sorcerer's spells known. Akashic form is a way of saying no to death. Psychic asylum has a number of odd uses.
I'm not sure these would be better than either playing a sorcerer with a bloodline arcana - the sorc/wiz list is pretty amazing already - or just playing a psychic, but if you're considering it they're spells to look up.
Neat, i'll look into them.
Any others that people would recommend?
Ill Omen is the obvious 1st level choice. There are as smattering of Oracle (Borrow Fortune), Cleric (Divination), and Bard only spells that are on the Psychic list, in addition to psychic only stuff.
Hermean Potential is a pretty good buff spell for both you and your allies. It's not PFS legal, though.