I tend to agree with Finman to the most part - the biggest difference is that "IF" I get a gentle hive "AND" I need queens, I'll steal a frame of brood from that gentle hive and raise a queen from it. Getting shipped queens isn't always an option, but raising my own by letting the workers raise a queen or two usually is possible.
The only downfall of course is TIME. Getting a shipped queen and introducing it could take just a few days - realistically a week. Raising your own takes nearer to three weeks. So, whether replacing out an agressive hive's queen or starting a new hive, you should try to do my method as early in the season as possible.
I've been lucky and only had a few really agreesive colonies. I knew that suiting up was the ONLY OPTION with those hives and I'd save my shorts and teeshirts for the friendlier hives.
We need to remember too that we are dealing with, interferring and working around a viable living colony. Man-made hives are wonderful things, but we are still thought of as a threat to SOME ill tempered bees. And in a world where it only takes ONE STING to trigger an ALERT MODE in a hive, there is very little room for error on our part.
That does NOT mean that we shouldn't ALWAYS TRY to work hives as gentle and least intrusive as possible. Even when suited up, work your colony as if you were unprotected and I can guarentee that you will have fewer bees chasing you back in the house when you reassemble the hive.