I think that you are going to enjoy your new camera. I'm a Pentax newbie of a few weeks and while I'm far from an expert on equipment, I just like the way the camera feels. I've have picked up Nikons and Canons and they just don't have that same solid feel. I am learning all the controls and what they mean and I find the K-3 very intuitive to use. I think it is important to feel good about your equipment.
I have to confess that after purchasing my K-3 I have gone on a lens crazy buying spree just a wee bit