They are just mainstream - but with that said, so am I
I hate the Pony collection. but I like and own:
Polo Blue, Polo Black, Polo Double Black and LOVE LOVE Original Polo Sport (Best sport frag ever made) - but longevity on all these suck, I get 4-6 hours from them all.
Polo Green is a classic - but today to most under 30 smells like grandpa, but I ilke it.
Polo Modern Reserve is a new take on Polo Green, some bN'ers call i Polo Green without balls, and I tend to agree, but it's very well made and I love Modern Reserve ven though it has no balls compared to it big brother.
I also enjoy Polo Safari, and own the 125 ml bottle and wear it often during the fall and spring.
Polo Explorer I also own in the 125 ml version and it's an OK scent - not a classic, but still a decent fragrance.
But Ralph Lauren Polo frags will always be considered mainstream - just like Hugo Boss frags, safe and good sellers. They earn Ralph Lauren a LOT more money than Serge Lutens + Tom Ford + Xeroff + Frapin + Killian all together do.