I feel like bringing up a few series that fo far nobody else seems to care about but at least I would like to have more of them:
Princess Nine:
While most of their personal difficulties have been resolved, their ultimate goal (Koshien) wasn’t achieved in the first season.
And hence they at least showed what they were worth nonetheless, I would guess that the next year some more freshmen-girls would join the baseball-club and bring with them their own disturbances, Plus there also has to be a solution for Izumi (who prpbably is my favorite girl on the team)…
Cat’s eye:
Perhaps not another entire season, but at least the real ending should be added as an OVA. Without it, the entire series feels a bit… hollow!
Candidate for goddess:
Come on! The so-far last episode was right about to bring the story to a climax - which now still has not happened - for years! I know how sales-increasing cliffhangers can be, but this is quite overdoing it!
Irresponsible Captain Tylor:
The TV-series itself was nicely finished and thus I might have been satisfied with it, but then…
… there were the OVAs which introduced a new third side to the war - who out-smarted the schemer Wang and seized the raalgon flagship with just one move of overwhelming power! Thus, I have to keep wondering how Paco-Paco, Azalyn and the the remaining uncaptured survivors managed to strike back against them later. Of course, there is no doubt that they will succeed, but I can’t imagine HOW…