Okay, before everyone lynches me for saying that I think alignment is one of the weakest areas of the Pathfinder RPG, please allow me to explain.
Alignment, should be, a foundation for a character to base their actions out of, and a DM to pass judgement on those actions. A character that is Lawful Good that steals candy from a baby should be an immediate red flag to both DM and player. However, alignment is only addressed in a very quick and topical manner in the rules which leaves huge sweeping interpretations on what all of the various alignments really mean when it translates into player actions.
It could be that your group doesn't really dwell on alignment and the ramifications of it, but I think that it is a crucial tool for players to build interesting characters.
So, the rules are combat heavy in Pathfinder. That is intentional and I don't disagree with that choice. However, I would like to bounce two ideas for managing alignment off the minds of everyone.
First is something we'll call the alignment slider. Essentially all it is is a cross that has the steps for alignment, the vertical axis could be Good/Neutral/Evil, and the second is Lawful/Neutral/Chaotic. Players would put chips on the two axes for their character and slide them appropriately as the game progressed. Now, the crux of all of this and the entire thing is what defines Good/Evil Lawful/Chaotic in terms of actions. Well, that should be a group decision. I think that the DM needs to complete a list of actions for type of alignment. For instance, a list of actions that are unmistakably Good and cannot be confused with Neutral or Evil. That list should be worked on with the players so they understand the basis for the system.
Now, the reason I say that there should be sliders is so that players can better see what is happening with their players. Being able to touch something makes it a lot more real and significant than just writing it down. The slider and the chips will bring a tremendous amount of focus to a player and their actions as it relates to alignment.
Second, is a system I am currently using and I basically stole the idea from another system and tweaked it. I don't let players write down alignment at all. Instead I have them write a simple sentence or two that is their character's core concept/motivation. Those two sentences serve as the purest essence for who the character is and what they will always tend to do. A DM can then secretly translate that into alignment. Inevitably some people's motivation will not easily translate into a single alignment, but that will probably still be fine.
What I found with this system is that when the chips are down for the players, and the temptation to metagame their sorry butts out of a tight spot, I can read that statement to them, and they wind up playing to their characters.
I allow them to change their motivation after any serious or traumatic event occurs after a session to reflect any changes that their character might have undergone. For example, I had a cleric that as a player, doesn't grasp the concept of good and evil, but has aligned themselves with a Good god. Her first motivation statement was, "Set everything on fire and heal it!" So I worked with her so that she understood that if that was who she was, she would be evil and her god would forsake her very quickly. She then picked one that was much more appropriate and it focused around protecting the hurt and healing their wounds. Now, she violated that twice. First she tortured someone, and brought them back to life to torture them again. Second, she watched someone murder an innocent child. She lost her god's favor after that, but she understood why because she could look at her motivation as her character and immediately see how she violated it.
I've written far too much at this point, but I'd love to hear anyone's criticism on these ideas and hear your own!
I have never liked Alignment. You can never get two people to agree what any one Alignment means. As a means of generating interesting role playing, I think it falls short as well. People who really want to focus on role playing are going to provide background on their character. People who do not, are going to largely ignore their Alignment anyway (in my experience).
I am sorry to be so negative. I think you would be better served asking for player backgrounds and simply ditch Alignment altogether.