Very insightful....when do you get your dispatcher license?
All ratings and aviation experience count. Stick time in an aircraft will gain you perspective that you don't get in front of a computer. Obviously the ATP written is far more advanced than a PPL ground school exam, but in real life every little bit counts. On my shift of 16 tonight we had 3 commercials and 3 IFRs (two guys are individual aircraft owners), a C130 navigator, 3 ex-USN ATCers, a former flight attendant, and I think there were a couple PPLs in there too, but I'm not 100% sure. Out of the 16 at least 6 pull in over 120K.
Your license will help you get an interview, and may help you do your job later, but part 121 dispatching experience is key.