I'm with LHB AIDS did a lot to drain Gen X's party pool and drive us to more conservative viewpoints re: sex for everyone, straight, gay, or otherwise.
W/o AIDS and ACT UP, the gay community would be closeted and not near as oriented toward stability vs IOTL in the US.
A lot more people'd be alive doing good work longer, but a lot of good work done on immune response that' made significant advances in stage IV cancer treatments wouldn't have been done w/o AIDS spurring that direction in biomed research.
W/o AIDS' demographic hollowing of Subsaharan Africa, population growth and economic growth would be creating an environmental disaster as their consumption of resources scales up in both aggregate and per capita demand to Second World standards.
Eventually, they'd get their acts together managing resources better after 20-30 years barbecuing the tropical forests and savannas for bigger, better farms, roads, railroads, and airports, etc.
We'd only be seeing a lot of African megafauna (lions, rhinos, elephants, zebras, antelopes et al) in zoos b/c the farmers and ranchers wouldn't stand for those animals stampeding over fences and eating their crops or culling their herds. Pay enough dudes bounties with AK's and helos to run them down and the animals don't stand a chance. In 5 years- there'd be nothing but bones left of anything bigger than a rat in the wild. Warthogs might survive as wild hogs have in the US but YMMV.
The people'd be immensely better off for a while until the competition for water and jobs and room to develop exhausts the resources. Hopefully, the education/affluence effect kicks in and pop growth drops enough not to stress the environment as much, but it's the massive consumption of resources for a generation, maybe two for that effect to tell.