We had a great time at the character connection in December. My dsis and I took my niece aged 4 in (my nephew wante to go play the video games at innoventions with Uncle John instead of meeting the characters). It worked out great because it was not crowded, and also my dniece was able to skip meeting those characters she was afraid of. When we were there, it was Mickey, Minnie, Goofy, Pluto, Chip and Dale, Donald, Mary Poppins, Hook and Smee, Baloo, Pinnochio, and erm, someone I did not recognize!
I thought all of the characters took their time and had fun with the kids, as well as with the adults. For example, Goofy got down on the floor with my niece, Mickey snuck up behind me while I was taking a picture and "kissed" the back of my neck (I jumped about a foot), Minnie "fought" with my sister over her Red Sox hat, Pluto chased my niece around...it was really nice.
Location-wise, character connection is right next to innoventions, behind the fountain bakery.