I was 9 years old when the Season 31 set changes took place, and man did that seem weird to me at the time. Very few things had changed with the set up to that point in my lifetime, so to have such a big change like that -- albeit minor by today's standards -- it took some getting used to.
Strangely, I actually liked the orange contestants row spot changing to yellow. Until I saw photos of it online, I always thought it looked red, and I could never figure out why there were two red spots and only one green and blue. Now I wish they would change it back to orange.
In response to the question at hand, I have vivid memory of both Barker 'sets' (same set, just different paint) from my childhood and early teenage years. The previous set designs existed before my time, so obviously I have no recollection of those. I guess the 1990s-2002 Barker set sticks out the most when I think back on my early years of watching
Price, and to me, that remains my favorite era of the show. Lots of fond memories from those days.
/The alternation between the orange and yellow contestants row spots is how I found out summer repeats were a thing. I had always assumed new episodes aired year-round. Heck, I even thought they were live!