I saw this quote on the Minimal Mac blog and it struck a chord.
"Here's a great rule of thumb: until you create something yourself and then actually ship it, try to first find the positive in the products around you. Those products are the result of someone?s passion, hard work and innate genius. When we compare them to our own twisted, entitlement-driven expectations, we do nothing but insult their creators." - Entitlement: Aaron Mahnke
There's nothing worse than pouring your heart and soul into something for months or even years, and then getting harsh criticism when you finally get the courage to show it to the world. It's OK not to like something, but just remember the thing you're attacking is someone's baby, their pride and joy. Be nice.