My edc is a ESEE Izula in the waistband or a Benchmade 943 folder clipped to pocket.  I think a good edc must be unobtrusive and comfortable to carry.  It's no good if it ain't on you and a folder is most convenient.  But as they say, "folder's a toy, fixed blade's a tool." 
Bull. People use folders every single day for any number of tasks.