Well, while i like almost every FF game, i started to dislike them after FF XII came out. For me my most liked are FF IV, FF VI, FF VIII and FF X. Now about Chrono Trigger, you should really finish it, one of the best RPG games in gaming history. Now, about Valkyrie games, the first one, while it has a clock time(periods)like system, to really enjoy it, you should play it on hard mode. More time, more characters and more dungeons to explore. about the good ending, time has nothing to do, other factors are the key for obtaining the best ending. The second one is really good and favorite to me, along with the first one, but 3 is just mediocre for me.