This thing is the exact same thing people over at the adventure forums go through seemingly monthly.
"What is an adventure game?"
The crazy thing is, is for most people both here and over there, an RPG and an old skool Adventure Game is essentially, to them, how it was 15 years ago. An RPG has a party, lots of stats, turn based combat and is top down. An adventure game is point and click, no combat, inventory puzzles and lots of narrative...also its 3rd person, ideally fixed camera, even more ideally ( to these people ) 2D.
This just doesn't apply today. You CAN find games like that, albeit less so today...but to say any one game is any more of an RPG/adv. game over another is kinda reacing nowadays. If your litmus is the 'traditional' version of these genres, then fine. But otherwise, these lines are becoming so blurred, its rather senseless.
Beyond Good and Evil is highly regarded over there with the adventure gamers, despite going against everything that they would argue IS an adventure game. It has action, full 3D camera in 3rd person and even minigames. It has far less puzzle solving than a traditional adv. game...but does have great narrative...great cutscenes. So who the hell knows right? Games back when were the way they were mainly due to techincal limitations of computers...with rpgs developers looking to bridge the gap between PnP and crpg's merely by having the computers roll the dice and crunch the numbers. I'd argue today that System Shock is more of an RPG than any other classified "RPG", merely by the fact that I'm IN the role of the protaganist, with my healthy dose of inventory managment and stat monitoring, conducting for the most part HOW I want my character to grow. Take that forumla, throw in a populated world, more freedom to explore and some dialogue and you've matched any rpg out there, minus the TB and 'top down-edness'.
I know I'm sorta tangenting here, but I wish for once everyone, like Exitium proclaimed, we would get past the specifics of 'genre', and simply wish for games that offer freedom of exploration, interesting story, character(protaganist) growth and simply be fun to play. This would pretty much sum up what both rpg'ers and adv. gamers want and we can be done with it.
No more pining for the 'good ole days'.
Cheers