We have the Canon 550D with the standard 18-55mm lens which I use 80% of the time, but I also got a Tamron 180-300mm macro lens which I love love love - I find my big lens is great for taking those non posed toddler pics from afar as you can zoom in from miles away un-noticed, and great for nature shots.
Personally I find the Canon very comfortable in my hands, but as I like to use the view finder rather than the LCD screen for taking pics I find I have to squash my nose up against the back of the camera a bit too much (maybe I have a big nose LOL)