To mirror TonyTheTiger's sentiment, Chrono Trigger and Phantasy Star IV, while maybe taking over 20 hours your first time, tend to get shorter and shorter as you get more familiar with them.

With the latter you can shave an hour or 2 off by running from enemies(except obviously the first boss) until you get the 4th character in your party, and then just letting their overpowered-for-the-short-time-you-have-them skills wipe out enemies until your underleveled chracters get to level 6.