I tried SparkPeople as well, and I became a "one post wonder" over there as well! It was too overwhelming...too much stuff going on all at once. Plus, I just like the FitDay layout better.
One thing I did like about SP was that you could get nutrition information about custom foods from other users. That saved some time entering foods for the day or two I used it.
But I ended up back here, so the lack of that feature must not have bugged me too much. =)