I too am late for the party. I can relate to everything you said in your iniital post. I'm 55 and just got my spl this spring. If you could find my rants (old posts) they would probably hit home with you.
I love sport pilot with the only complaint of late the availability of aircraft.
I have no desire to fly at night or ifr, perhaps with a bigger budget I would be somewhat interested. When the weather sucks I'll do something different.
I just flew into Ocracoke Island, N.C. this past weekend and must say the takeoff along the ocean was as special as any I have ever done.
I am very glad I ran the Gauntlet.