I hear ya! Most of the time i can just nod and smile or brush it off. When i'm going through a rough bit, and trying to work out what i can try next, it gets a bit harder. It's those times that i wish someone would say 'you are doing a great job'. it's the naysayers (usually people who do lots of things i wouldn't do and whose opinions i don't really care for) that seem to want to speak up then.