I've flown on 737s for years & recently flew on a couple 10 hour flights on a 787, and mostly I like those planes well enough. My most miserable flying experience was on a couple 14 hour flights on a 747. I think short haul flights on a 737 never bother because they are short. The 787 flights were nice because the plane was new, and the person in front of me didn't recline their seat into my space. Maybe I just don't like long haul flights on old & crowded planes, which the 747 most certainly was.