If you're referring to commercial aviation, I can tell you what carriers I've used. The first time I've ever travelled by air was with the now defunct Trans World Airlines (TWA) [American Airlines bought them]. My first experience was one of the best I've had in an airliner. I think I rode on a McDonnell Douglas jet on one my flights. Since 2001, I've flown with Continental, with the exception of my last trip (which was NWA/Northwest) and on a voluntary deal in 2003 (I think) (flew to another city before going home on American, and Continental gave me a voucher for discounted travel). I know I've flown on Boeing 737s on my long Continental fights, except for the shorter flights (I think it was an Embrarer or something). The thing I like about Continental is free snacks and meals (if desired); which I learned on NWA that they do free beverages, but the food/snacks are not free (probably to keep flights as low as possible). Also, the major hub is in a city I've been to many times in the past, so it's not too terribly far from where I live right now. I also have frequent flyer miles through them.
As for the rest, I don't know much of anything.