Nap as ruler of Haiti:
Nap was the driving force (as French ruler) behind regaining Louisiana. He was the driving force behind expansion (as French ruler) throughout Europe, which made it possible for him to offer up Parma in exchange for LA. He was the driving force behind unifying France and emerging from the revolutionary years.
Put him in Haiti pre 1800, the entire world history changes. however, assuming France still unifies, and regains LA, and presuming he doesn't die of yellow fever, as soon as he starts getting too uppity (he's not going to be content to merely be a governor taking orders from afar), France simply shuts off supplies, and Nap doesn't have the troops/materials to do much. He can probably hold Haiti, but without continued influx of French troops, the size of his army continuously diminishes. Without French support, he can't expand in LA, and he can't leave Haiti or he loses it. the US and Britain are going to team up to prevent any sort of strong French presence in North America. and besides, Nap's genius was military, and co-opting some of the ideals of the revolution (like the legal code). Not sure there was ever much sign of him as being much of a such a competent domestic ruler that he would be anything out of the ordinary as a guv.