I struggled to get through the first season a bit, I rarely found it funny and it felt a little forced. But I decided to stick with it, and completely fell in love with the show during Season 2. I love all comedies in that block (Office, 30 Rock, Community) but Parks & Rec quickly became the one I'd look forward to the most. The episode where they combined all of their very different ideas into one very strange mural was sort of the turning point for me, and from the hunting trip to the telethon to Freddy Spaghetti, I loved it all. The cast is stellar, and each character has become more well defined and well portrayed. The writing got sharper and funnier, and was wonderfully balanced out by the sweetness of the relationship sand friendships that we get to see - Andy and April's almost romance, Leslie and Ron's respect for each other, and especially the friendship that developed between Leslie and Anne.
Adding to all that is a city filled with some great off beat characters that pop up now and then and a lot of fun "inside jokes" like the endless rivalry between Parks and the Library, and you get a funny, sweet, silly, excellent show.
I would highly recommend it, and really hope it hangs in there!