I'll be making a Pathfinder D20-based RPG (Less Lawsuits. Just gonna pick out one or two good ideas, and add my own). It may take me years.
It's intended to be a tad like Shining Force, but with more flexibility, and using a Hex grid.
The plot hook: You are Lyle the Warlock, a recent graduate (and to the chagrin of the jingoist faculty, valedictorian) of the local arcane magic college. The Empress of a mighty empire calls you and a small group of her champions to combat the menace of a cadre of necromancers...at first.
The characters will be able to level up and multiclass as a normal 3.p character, but it'll be more limited for ease of balance (e.g. the Samurai character will never take levels in Sorcerer, as he distrusts arcane magic.)
So if you ever see a game called "The Warlock's Journey," know that it's probably me.