Oh, I really enjoyed TFA as both a film and a fun SW event too, but Rey or Finn just aren't even close to the same category of intense fandom and fascination as Luke or Han were in the 70's/80's. The OT bullseyed something deep in the culture. And Kylo Vs Vader is a bit like Muhammed Ali Vs. (insert whoever current heavyweight title holder is.)
The OT characters instantly hit like a hurricane in 1977 and held the public's intense fascination for a decade - then returned as classic icons years later. Finn and Rey and Poe are fine as characters, some nice moments/interactions etc., but their penetration into the public consciousness/fascination has been pretty minor and they won't be on the general public's list of favorite characters once the ST hype has passed.
We live in an era where characters can be forced down people's throats in the supermarket, dentist, you name it, so their "bought" profile can be mistaken for significance or popularity. The classic characters eventually had that saturation too - but it was because supply was precipitated by intense demand, not mostly manufactured demand fueling supply like today.
And... were there any "characters" in the PT? Let me try to remember...