Carniolan - superb spring buildup, excellent honey production if properly managed, very strong swarming tendency. There are some excellent strains available in Europe. More important, there is a huge amount of breeding work going on with these bees so long term improvement is assured.
Caucasian - good performance where fall flows are the primary honey crop, very strong tendency to collect propolis. IMO, these bees are more of a niche than a mainstream breed.
Italian - excellent overall performance whether spring or fall flows, tends to maintain very strong colonies year round which can cause problems in mid-summer and during long winters where they can consume all their honey. There is a lot of work ongoing to improve Italians, but most of it is for Mediterranean climates or for migratory beekeeping.
Native black bees - exceptionally good wintering, adapted to adverse conditions, medium honey production, can be aggressive especially when crossed to other races. These bees are arguably best adapted for smallholders with a few colonies of bees that are not heavily managed.