I hate it too. Sometimes I can delay it for a few days by starving myself, but when it does happen, and the most I can manage is 3-4 days delay, it's more miserable than usual. I hate it because I hurt, I have no energy at all, I feel icky, and I feel subhuman. And I hate when I say I don't feel good, or it's just plain obvious that I don't, or I'm reduced to a lump on the floor without the energy to even sit up, and somebody wants to know what's wrong and won't accept that it's just normal for me to be like that for a while once a month, and I don't want to talk about it. Aren't we supposed to go to any possible length to hide it lest we die of embarassment?

So, what do you hate about it? We can start a club.