I class myself as a 'super saver'. Won't comment on my savings but it's quite a lot. In fact, the lady with the 75k and Kindle and myself should talk
Anyway, I'm doing it to pay off another mortgage and then I'll consider semi-retirement. if I didn't have a goal in mind I wouldn't do it.
While I still treat myself, each and every purchase is super super super carefully reasoned and calculated. My biggest treat this year has been my PC (sig) which I bought with tax back and some interest I've earned.
When my salary hits my account, I straightaway start moving money around. I know my fixed costs to within 10 bucks. That goes to the 'House' account. Next I'll move the bulk of it to a savings account and the rest is mine. While I don't leave myself a lot to spend in the eyes of some of you wasters

p) on here, I don't even spend that and as the months go by, even that builds up. In fact, I recently moved about 7k out of my 'Wastage' account to my Savings account. I just don't need or want anything expensive or new.
Listening to people at work, it's beyond me how they always managed to sniff out or dig up new and expensive crap to waste all their money on.
Each to his own though. Having lots of savings relatively young in life makes me happy and sets me up well for a (already) stress free future. As long as you're happy and doing what's right for you.