Of all the 30s this may be the most useful. Specialized to a sub genre yes, but that is what makes it useful. The Fountains of Youth was entertaining, but the only way you would use is it you or a player built around it, 30 Bards ... yeah if you find all your bards being the same, but you likely won't use all 30. However in the mech genre, the pilots are supposed to be personalities. The story telling troupes generally present mecha engagements as grand scale duel, or "small unit big guns" combat. But lets not kid our selves the first thought is generally about the mechs, then later... maybe a pilot. (I know there is somebody out there who has played a secession of battletech in which it was all character development and subtle wit, but I am speaking in broad strokes). I could see running a battletech campaign and using half this in day to flesh out a company. Of course the player may not even talk to the pilots but the point I have these personalities on the shelf if they decide to.
Extremely useful and just really wonderful to have all these things in one place. In globe and galaxy trotter campaigns you can dozens of "worlds" and it is nice to have a little help making those world unique. By giving us very developed concepts you make it quick and easy to mesh this stuff with exisisting ideas.
19 is an idea I would like to develop further into whole religion and culture.