That is part of the reason we do so many PS's. I figure it doesn't cost me that much more than counter service if you factor in the value of time saved standing in line for characters. All meals have the characters go from table to table for autographs and pics. It is a great opportunity. (Some of the meals have 1 character that is stationary for you to see on the way in or out).
Tw, the ice cream social in the land at Epcot is the cheapest (and a good) characte thing. It is $6.99 a person for ice cream - 3 and 3:30 seating only. It was a refrshing break and we got pics and autographs with Mickey, Minnie, Chip & Dale.
Good luck
Sandy