I was thinking about booking an open-jaw TPE-TYO-SIN (or similar) on Delta and my friend stopped me. I ended up spending an additional night in TPE returning home from Tokyo and sticking to Scoot instead, since it's Singaporean and could not be THAT bad.

Friend does not like American airlines in general, and then she had a bad experience trying to fly out of Singapore to the US where one of them overbooked the flight resulting in her almost missing an important job interview. She ended up forking up more money booking a SQ flight.

I don't like European carriers all that much either; Asian airlines are generally a lot better.