My/our first Oneworld RTW (20 segments, paper tickets) started and ended in Istanbul, which was the cheapest of its day. Our aim was to see places on our wish list and to see some far flung family. However I also was keen to earn enough AA qualifying points (or "Q-points") to make Executive Platinum (OW Emerald) in AA's FFP.
This quest led to something of an epiphany as we tried to wrap everything up in one calendar year, the AA requirement. I did a trip report commemorating this dubious achievement.
Turkey Day