Role VS Roll.
I say there is room for both at tables. While my general preference is 'role' I also like having a campaign where being total combat monsters is a blast.
Right now I'm running two different PFRPG campaigns: Rise of the Runelords and Carrion Crown. Both groups are with people I've gamed with for (in some cases) over 18yrs. As the DM both run totally different. And its ok by me. The Runelords group is more 'roll' and action with a lighter take on 'role' as we seem to be having fun smashing through more and more difficult challenges. Its comprised of six players that historically like to 'role' but it is a bit more combat and action heavy.
The Carrion Crown group is the more 'role' heavy game (with FastJack playing his uber dwarf in it). They have taken vested interest in the world around them, I've had to create personalities for basic townsfolk just because they talk to them, text blocks in the module have gone from reading out loud to I'm throwing in more emotion and improv acting. One of my favorite roles was that of the Beast of Lepidstat (think frankenstein's monster). Lots of physical power with the mind of a child. Good role playing there. This group challenges me to improve the world for them as they interact with it. Runelords group interacts more with themselves and the mission than their surroundings. Nothing wrong with that.
So its not wether 3.x/PFRPG has more roll or role. Its the groups of players. It happens in any RPG setting. You will always find the power gaming mega weenie that just wants to sling dice and you will always find the ones with the in depth character history that wants to play out their personality all night. Either is fine & acceptible for the group dynamic.
Just as long as you as DM and your players are having fun, in the end, does roll vs role really matter?