I've just bought 5 pairs of knickers in the La Senza sale and wore one pair today. I spent the day hoiking them out of my bum, then put them in the bin as soon as I got home. 
I'm sick of wasting money on knickers that I never wear because they are too uncomfortable. So, tell me, what are your most comfortable pants? I don't do thongs. I don't care what they look like, comfort is paramount!