I don't love or hate re-buys, I look at them as if they were a SNG, tight early on with an advantage, if I lose my chips to a bad beat, I can just re-buy'
I like to sit back and watch those who go allin almost every hand, they gain a large chip stack and after the re-buy period is over I can pick off them, as most of those players are not very good.
If you let yourself go on tilt during the first hour of a re-buy you won't play your best, just keep your patience, and sometimes it's a good Idea to gain a decent chip stack with-in the first half hour, say you start with 1500 in chips and 1/2 hour later you have 8-10k in chips(which is not hard in a re-buy), its time to sit out until the re-buy period is over. The blinds are not that large, so no worries about losing alot to the blinds, then you add-on and now you ready to play some poker.
If I'm wrong and there's a flaw in my reasoning , let me know.