It really depends. Not all jrpg’s are equal. I can play final fantasy 7 all day but cannot stand dragon quest (as much as I hate to admit it). I love menu-based battles, but I think it’s a delicate balance which is easy to mishandle. I think ideally, animations need to be enjoyable to watch (you’re going to be seeing the same animations through large portions of the playtime), menu flow needs to be fluid, and ideally I think battles need to be able to be resolved in just a few actions. When standard battles linger, I think that contributes to my own fatigue with a game, personally. Also games which have engaging quirks in battles add a lot of value to the experience, a la super Mario rpg. Good jrpg’s are some of the best games of all time, imo.