Humble SLF, but would have to say Kinshasa, Lagos, Luanda top my list although I have not been to any of them for the last 3 years so they may have improved !. Can put up with most other places although Home land security seem to be taking more of an interest in me these days for some reason, resulting in some periods being delayed at immigration when entering the Empire, which is putting me off the place a bit. Russia and the Stans also some times a little interesting although in Almaty I always seem to meet same immigration officer and get whisked through.
Regards
Mr Mac