I'm pretty indifferent to it as a game. What I hate, though, is the way so many gamers associate all smart phone games with it. You may or may not have noticed this, but on a lot of general gaming forums, people trash smart phone gaming all the time, typically saying something to the effect of "they're good for old people and little kids to play for a few minutes, but I want better games than Angry Birds.*" It just gets on my nerves, because there's so many better games out there, games that do everything these people say smart phone games don't.
*Except it's generally stated in an angrier and less grammatically correct manner.