I can see East Africa is pretty much your preferred coffee region, and a good choice it is too. Any likes/opinions on other global coffee regions, such as South America, Southeast Asia or even obscure ones like Hawaii or Jamaica?
I love the east African coffees for their clean, clear, bright, smooth and sweet tasting notes.
These are the qualities I have come to realise that I love in a coffee.
Now, coffees that are bitter, 'heavy', and 'muddy', I don't much care for; I will drink them if nothing else is available, but will find myself adding copious quantities of sugar to them, as well.
To answer your question, yes, there have been some coffees from other regions that I have liked. For example, the Intelligentsia coffee company have had an excellent coffee from El Salvador called Los Inmortales; it is seasonally available, (usually in summer time, if memory serves) and I thought it superlative - sweet, smooth, with a lovely depth of flavour. I recommend it highly whenever it becomes available.
The only - and it is the only - reason that I haven't bought it over the past two years is that the cost of postage of the coffee to our wet isles is outrageously expensive, and, as I have been able to get decent coffee here, I no longer considered it necessary to order stuff from Intelligentsia.