Of united players, Ronaldo isnt high up on my list of undesirables. That is easily headed by Neville, Scholes, Keane and that scumbag Giggs. We had Schmeichel, Kanchelskis, Cole, all play for us. Tevez was the best tho as he clearly wound up Fergusson.
Ronaldo is arrogant no doubt, but i cant recall him ever having a pop at City. If you wanted and were willing to accept Messi at City then there is little difference to accepting Ronaldo. He would do a job for 1 to 2 years, then we could go all out for Harland.