Keyblade Warrior Sora (Kingdom Hearts)

The "accidental" Keyblade Warrior of Destiny Island, plenty of choices, but Disney movies will never look the same once he gets through with the women.

Where you gonna start? Destiny Island? It's a bit boring, but Kairi and Selphie are there to get your feet wet for enjoying.
Traverse Town? Lost of potential options there even if there's not much to do, though you could change that easily.
Another world entirely? There's no shortage of worlds to reside or arrive on and plenty of things to change to make it more fun for you.

Regardless of the path you choose to take, the main question for it all is: Are you going to more worlds than the games did? There's plenty of Disney Locations, counting Star Wars and Marvel now too, as well as Square Enix games if you want to go beyond the Final Fantasy Games, which all together adds almost two hundred women to enjoy.

As for the Paths:

Is he still the hero? Maybe he's a paragon of light and enjoys the rewards and love of the various princesses and allies he makes.
Are Donald and Goofy coming with him still? Or maybe Aerith and Yuffie (and maybe Tifa too) tag along because Donald and Goofy aren't able to.
Gain the princesses as your lovers and queens since nothing says the good guy can't have as much fun as they want.
You could take charge of Traverse Town and make it a haven for those displaced, nowhere else to go, those who want to leave their worlds for better a better life, and more. Could pull an Overlord (game not anime/manga) and get creatures of light the more Heartless you destroy and hearts you free and make Traverse Town your main base.

Is he going dark like Riku did? Get the villainesses into your bed and get allies by helping them get **** on the so called heroes and heroines that always seem to get the happy endings despite not working near as hard as the villains do.
Join Maleficent and get to know the villainesses and maybe "break" the Princesses of heart to corrupt them and ensure the Door to Darkness can never be closed again. Maybe helping the villains in return for getting first choice of different women to enjoy.
Maybe pull an Overlord (game not anime/manga) and take command of the Heartless and start recruiting and building their numbers and your power grows by swallowing worlds with darkness giving you more and more Heartless to summon to crush your enemies and you can remove or convert those who would stand in your way or try to manipulate you.
You could make Maleficent your student and her daughter into a pet, get Jasmine to embrace the darker aspects of life and turn Agrabah into a den of sex and debauchery while you get various harem slaves, so many dark and cruel things that can be done and so little time.

Is he going grey? He'll help people but only when he's getting something out of it and he's not going to go looking for trouble, he'll do favors for anyone.
Maybe take over Traverse Town and turn it into your own personal harem and sex town. Plenty of worlds getting swallowed and lots of women displaced that need a safe place to stay and someone to comfort him.
Maybe you just world to world doing jobs for various people, sneak Jasmine out of the palace for a price. Tell Ariel stories of other worlds. Save Alice from getting her head chopped off. Save Jane from the animals and Clayton. Lots of jobs to do, lots of payments, thanks, and rewards for the jobs.
Everyone wants to win the war, but they need to pay to get your help.

Then there's the Games: Are you in Game 1?
Chain of Memories?
2?
3D: Dream Drop Distance?
Recoded?
3?
None but your own creation of a world or adventure? There's a bit of appeal as you could just combine the universes and worlds and then do whatever you want could even take over Traverse Town and make it a vacation/debauchery hot spot, make it bigger and more popular than Vegas ever was or could be.

Regardless, the user of the Keyblade is gonna get famous/infamous for a different reason.