Every time it comes up, I rant about the need for a human-sized seat that's only perhaps 50% more expensive, but it virtually doesn't exist. (Save Premium Economy on Lufthansa and Air NZ, neither of which I've ever tried due to arcane rules about what seats you're allowed to pre-buy on what codeshares.. thanks, United).
Wanting enough space for my elbows to be able to stay within the confines of my seat should not cost me 10x as much.