Seems that their pre season form is good. Have been a Man City fan for the past few months.. now waiting for the right time to switch back.
First you're a fan of ManCity (for a few months as you say) and now you want to be a ManUtd fan, that's funny.
What if QPR this season outperform the large clubs(which won't happen), you'll convert yourself into a QPR fan?
Stick with one club, if you like to be a fan. Otherwise just be a fan of football in general with no bias towards a certain club.