Light Sport is a terrific way to start flying, especially since they fixed the training rules and now accept SP training toward PP. SP is a good way to start for several reasons:
1) No medical required, so no delays to solo while waiting for OKC to get around to issuing an SI and no risk of a denial.
2) The pilot is forced to fly in simple, slow planes. No students trying to buy a twin retractable to learn in.
3) Good stick & rudder skill training. Due to the low wing loading, LSAs are tricky to land in gusty or crosswind conditions. When I transitioned from a Tecnam LSA into a Cherokee, it was like having an auto-land system.
4) Unlike the Rec ticket, SP is a useful license. It's easy to get the endorsement to use towered airports, and you can fly anywhere in the US and the Bahamas. Lots of folks do serious XC flying in LSAs (witness the recent round-the-world flight). And most people with PP are flying day VFR with one or no passengers anyway, so the SP limits aren't much of a burden.
5) If you complete the SP cert, all your training counts toward PP should you decide to get a medical and continue training. Going to PP was actually pretty simple for me; I just needed the night training and a little extra hood time.
6) It's the minimal financial investment to get a pilot's license.
7) Lots of good aircraft all through the financial spectrum, from modern glass cockpit birds to classics like Ercoupes and Luscombes.
You might consider that motor gliders can be flown without a medical. For a pilot who can no longer get a medical but has a PPL + IFR, a motor glider might be very useful.