Zanna - I'm the same, I've always been quite active and enjoy outdoor sports like hiking, climbing etc and I swear that before I went on this diet people believed that when I told them I'd gone surfing (or whatever) last weekend I was making it up! Why would I lie?!
I also think I've lost out on jobs due to size.
Also, this is the second time I've lost a lot of weight. The first time I was 18 and I went away on a gap year (don't hate me!) for 6 months and came back 3 stone thinner - because it happened so quickly, I went away obese and came back thin, the difference in the attitudes that people had towards me were even more noticeable and I must say it made me quite resentful towards a few people.