I just visited all the factions (except V-Tec) and took a peak at their bases. The Lawyers is by far the worst (sorry faopcurious) looks real ugly imo, the music is really weird, the feels like your living in a spaceship. The Family's by far looks the coolest, lots of variation here, reminds me of New Vegas, although the base itself is quite crammed and feels like someone just through a bunch of beds, crates, lockers etc... in a office building. The Brahmin Boy's base I have actually owned one so I know a little more about it than I do the others, its pretty large, annoying to get to because of the distance it is from everything, you feel like a true farmer, again the lockers and crates and what not feel random and that they shoudn't be in that location.
I'd have to say the Family's base is the best so far, dark atmosphere, interesting NPC's but above all feels most like Fallout...