I can't really see Fabregas leaving Barcelona any time soon, but then again, I couldn't really imagine RvP joining Man U either, so who knows. To answer the question, yes, I want him back, but what's interesting here though, is that If he does decide to leave them, it would be excellent news for us, even if he doesn't come back to us. That is of course, if the 50 per cent sell-on clause that several papers claimed we managed to make a part of the deal, actually exists.
Scenario A: We get Fabregas for a lot less than what he's worth, seeing how other clubs would have to double our offer in order for it to make any sense to Barca to sell to them, rather than us.
Scenario B: We don't want Fabregas back, but we'd still end up getting 50% of what Fabregas would sell for on the open market, which would be a lot.