I have had, and enjoyed, Buckfasts for many years. They were calm, easy to work with and ver productive. But this last year after swarming they turned viscious. I had a similar experience, but not quite as bad, with Starlines. I'm leaning more toward avoiding the hybrids (Buckfasts, Midnights, Starlines) and stick with some open mated types. I think as far as Italians, Caucasians, Cardovans etc. they all seem quiet and production. I'm going to try for bees from survivor feral stock. I have tried Italians (from several sources), Russians (from several sources) and liked them both. I had one Harbo and they absconded. Not proof that they all would, but this one did.