[quote name='Ledhed']I've done pretty much everything there is to do in the game; every sidequest, every rare item, I did it all. And now I just can't motivate myself to finish it.
Also, don't finish the game without getting Citan's, erm, "secret" weapon. You may have already, but it's a totally different game once you do.[/QUOTE]
Ledhed, like always, is absolutely right about Citan-- that weapon makes the game much much easier. If you're looking to powerlevel, there is a spot in the final dungeoun that gives incredible exp and money-- check out an FAQ, as I can't remember exactly.
The entirety of the Xenosaga is confusing as all get out, there was a webpage that completely intertwined Gears with the two made Saga games pretty well, give me a little to find it again.