Peen Simmons
Let’s Get Obtuse!
I prefer power as the primary motivator, with love interest/jealousy/possession of women as a sign of said power being secondary.
The details of the motivation *thing* matters less than the character stuff and the internal motivations.
Star Wars is King Arthur in space. In these types of romances, the personal and the political are intertwined. For example, Mordred wanted Arthur's power, his favor, his kingdom, and his bride.
I think it would have been interesting to show how Obi Wan was miscast as a Jedi knight. He's a wizard, not a warrior. The sort of slippery intellectual trickster who can justify a lie with claiming it's "from a certain point of view." A young Obi Wan might have been roguish, too clever by half...more of an Odyssesus who used his brains to get himself out of jams that his mouth got him into. A talented but morally rigid star quarterback like Anakin might have been put off by his mentor always getting away with shit by following the spirit of the Jedi code but not the letter of the law. As Anakin got better than Obi Wan at Jedi-ing...Anakin may have become a buzzkill for Obi Wan and Obi Wan may have become jealous of his success and then used his seniority or smarts to keep Anakin from getting ahead in some way that turns a good natured rivalry into a rift.
Power, personality, love can all be commingled into something toxic...leading to Obi Wan's Pyrrhic victory over Vader and then slinking off to Avalon/Tatooine to think about what a bad Jedi he had been. Because Merlin would make a terrible Arthur.