better than any other, really, if only because tranquility is a thing in-world that everyone (sans rifters) is aware of? there aren't any tranquil PCs right now, but i'm pretty sure the mods have said that they're appable.

a tranquil character would be a challenge to play, i think, because character development itself would be difficult, but if it's something you're interested in that you think you could pull off i say go for it! i'd love to play off a tranquil character and i think it'd be really fun to see how different characters would react and interact with them.