i wouldn't call it "pessimistic" at all. i think of it as respectful or not, that's it. someone who thinks i have all the time in the world to help everyone else, no matter my job or personal requirements, is simply not thinking about my time. i love helping others out, but i don't think it's right to burden another person with your favor (yes, i said burden - even if i want to help someone, it's still a burden as it has impact on my schedule, typically negative - doesn't mean i don't want to do it, but it should still be considered that way...