All of the AP's up to and including Legacy of Fire are 3.5 rules and not Pathfinder. So the DM will need to convert them to Pathfinder. However, to rate the AP's based on flavor/mechanics/appeal/style, here is my list with 1 being the best:
1. Legacy of Fire(sorry I loved Al-Qadim and Kingdoms of Kalamar, so how can I not like this) DMing
2. Rise of the Runelords (it just has pretty much every main genre thrown in. Want mystery, check; Want horror, check; Want fantasy, check; Dungeon crawl, check; Hack'n'Slash, check. Yes, you may have to slug thru some parts you may not like, but it is not your typical long wait nor is it totally boring.) Played
3. Kingmaker (So far, I like it because to me it feels like RotRL by including many types of genres, but it does it by giving the players the ability to control when the events will happen. My biggest problem is not the AP itself, but the hype people place on it. Is it a sandbox, sorta as you still have to accomplish the tasks provided to achieve the final X to unlock the next book or end of campaign.) DMing
4. Serpent's Skull (From what I have read, this may just beat out all of the AP's to date. I am eagerly awaiting the final books to render a final verdict, but I think Paizo has done a great job with this AP so far.) Read
5. Curse of the Crimson Throne (Great story, poor execution.) Playing
6. council of Thieves (Have not read or played but this AP holds more appeal to me than Second Darkness)
7. Second Darkness (doesn't do it for me and probably will not ever pick up the AP to read)
I would like to one day check out Paizo's other AP's from when they wrote Dungeon Magazine.
1. Legacy of Fire(sorry I loved Al-Qadim and Kingdoms of Kalamar, so how can I not like this) DMing
2. Rise of the Runelords (it just has pretty much every main genre thrown in. Want mystery, check; Want horror, check; Want fantasy, check; Dungeon crawl, check; Hack'n'Slash, check. Yes, you may have to slug thru some parts you may not like, but it is not your typical long wait nor is it totally boring.) Played
3. Kingmaker (So far, I like it because to me it feels like RotRL by including many types of genres, but it does it by giving the players the ability to control when the events will happen. My biggest problem is not the AP itself, but the hype people place on it. Is it a sandbox, sorta as you still have to accomplish the tasks provided to achieve the final X to unlock the next book or end of campaign.) DMing
4. Serpent's Skull (From what I have read, this may just beat out all of the AP's to date. I am eagerly awaiting the final books to render a final verdict, but I think Paizo has done a great job with this AP so far.) Read
5. Curse of the Crimson Throne (Great story, poor execution.) Playing
6. council of Thieves (Have not read or played but this AP holds more appeal to me than Second Darkness)
7. Second Darkness (doesn't do it for me and probably will not ever pick up the AP to read)
I would like to one day check out Paizo's other AP's from when they wrote Dungeon Magazine.