Action role play: yes.
Customisable character: No, because I will be creating an indie game that tells a story, not just entertains you. The character must be fixed, and in a certain way. However, I think that you must have a choice between two characters to play as, or have some sort of influence on who you are in the game. For example, one idea I have is that the game is set in the future, and there are 2 'factions', like future races. You can choose, based on your personality, which faction you will be part of. The faction you choose will be the character you play as, and your choices will be different, based on what faction you chose.