There is an odd misconception that lyrical music should only be used during important scenes or for endings. Xenogears and Xenosaga are two games that actually have several musical pieces featuring lyrics and I feel they are a nice change of pace but once again they fall into only being played selectively.

Persona 3 on the other hand, is the first time a games soundtrack mostly has lyrical tracks. For the game and its setting, it fits perfectly. Despite having lyrics or not if a song is well implemented then it can have a profound impact storywise.