I would be really excited if they did another console or handheld Star Ocean. I'll admit being disappointed with 3 and 4, mainly due to the plots of both games (as well as 4's characters, except Arumat) but I loved 4's battle system and thought it was the best in the series. Also, I liked that 3 kept the optional character choice system, where there are 4 potential characters that can join your party but you can only choose 2, which reminds me of 2 with choosing between Opera+Ernest or Ashton and Bowman or Precis. SO2 is one of my favorite games ever, so I definitely hold the SO series in great esteem despite the shortcomings of the latter entries.
If they made Private Actions like they were in first 3 installments I'd be really fucking happy.