I've flown on private (corporate) jets before. It's pretty much the best thing ever. No security, no lines, no bullshit. Lots of leg room. Decent wifi, and electrical and USB outlets. Nobody sitting next to you, no fatties, no smelly people, no loud people. No children. Oh, and free food and drinks from the company.
It's everything that flying could be.
Also fun: private airplanes (two-seaters, four-seaters, and the like); and traveling on a not super popular route but on a major airline and airport (eg: San Jose, Portland, Phoenix triangle) on the first flight of the day, on a central weekday (tues/wed/thurs); you get an airbus c230 or some shit, with three seats per person... so you just stretch out lengthwise and go to sleep.