I've flown 19 BA sectors in the last 12 months and I'm guessing that's probably on the low side for this forum.
1 WT
2 WTP
13 ET
3 CE
I don't have the exact number of segments for other airlines to hand but probably about the same again. For sure I've flown at least once on each of AA/QR/U2/EW/FR/PG/IB/BE in the last 12 months.