"Aside from it bein' hot as fuck?" he replies. "There ain't shit on it that's useful to us. The iceball would've been best, because it's got the fuckin' embassies on it or whatever, but this is where they found the Door. Sorrow said there's probably other shit still around, too."

It's a good place to hide from the Null and a place where they might be able to find information. That makes it a decent candidate for 'places to go after you get your ass kicked by a bunch of robots' in his book, because they're going to need more information on the Null before they go toe-to-toe with them again. Gren's not real fond of getting his shit wrecked.

"And what's wrong with a little fuckin' water? Can't you swim?"