Wow a lot of the choices are nonsensical since they had closure already. There's really no point to continue them though I guess Clannad could use a final OVA after everything occured. You'd just get mostly anime original fluff though.
How can Yosuga no Sora have a sequel?
True Tears I guess could have a sequel showing the true ending.
Shin can end up with who he really should be with
Kaiji's a good choice; I need more lulz.
Oreimo, I need more than a silly peck on the cheek!
Hana Saku Iroha , eh, well, I enjoyed parts of them but I think they'd outlive their stay with a sequel. I have no desire to continue; same with Angel Beats