BOMW - I admire your enthusiasm but your blog is promoting some real old wives' tales. If you want to learn more about beekeeping I suggest buy yourself some bee books for Christmas or better still persuade others to give them to you as gifts. I won't recommend any one book as you need to read several and then try and work out where the common ground is.
But as a starter, there is simply no truth in the idea that nasty bees collect more honey - except if they are robbing it from your hives! There are docile bees which are good foragers and nasty bees which are good foragers and of course bees with the opposite characteristics. Defensiveness, which is the polite name given to the habit of some bees to sting you with impunity, can be bred out of any strain of bees by selection of queens and ideally selection of drones, although that is more difficult. Part of the selection process can also ensure the bees also retain the other characteristics you want - including foraging and disease resistance.
Colour of bees likewise has no relation to the bees industriousness. I have seen an image of a hive in Ireland with native AMM bees which had about 12 supers on it and the bees themselves were legendary for their quietness - the beekeeper was Michael Mac Giolla Coda - who is worth Googling as a starting point if you want to learn more about AMMs. But you will also hear horror stories of others with AMMs who gave them up because of the bees' behaviour.
However, as already mentioned, given where you live you can forget AMMs unless you want (and are able) to buy new AMM queens every time you need one, 'cos you won't raise them yourself unless you resort to artificial insemination.
There is endless discussion on what an AMM should look like and how to identify it but as an illustration of just how black they are see the image below.
I hope you won't write up my feedback as another mauling by this Forum, but the term Black Bee has a very specific meaning in beekeeping circles. Beekeeping is full of ideas which have no real basis of fact and yet which keep getting repeated thus giving the ideas a new lease of life.
I haven't read all your blog but I couldn't help noticing you painted one of your hives with Sadolin Classic Wood Protection. I don't use wooden hives but if I did I am not sure I would use this stuff. If you look it up on the Sadolin website you can download a safty data sheet on it. These documents always read alarmingly but it does say it contains 10% - 30% Naptha which at first made me think of mothballs, but they are made from naphthalene, which is a different stuff. Naptha is widely used in the petro-chemical industry and is also the main ingredient of some lighter fluids. I guess it is there as a solvent so providing the hives were well aired before the bees were added you should have been OK but the recommended Cuprinol clear has less than 3% Naptha. I offer this as you did ask in your blog for comment.
