A human Fighter-Wizard staff master. Go into Eldritch Knight. No armor, no sword, just robes and a staff. But if someone sees him and comes up to melee him thinking hes just a typical Wizard, he goes totally ninja with his staff, full two weapon fighting and two weapon defense all the way, specialized and improved crit and everything. And take Craft Staff and make an arsenal of different custom staves.
Ive had the idea for a while but just havent had the oppurtunity to use it.
Also, a hyper, coffee addicted Fighter/Monk name Java Ginsu, who uses two longswords with the one feat from the Eberron setting book that lets you treat them as Monk weapons. Between Flurry and the combined BAB of a Monk/Fighter, and the full TWF chain, thats like 9 attacks a round at 20th level, and then of course use longswords of speed for 2 more attacks, and kifocus so they act as adamantine weapons. I just want to try it. Java Ginsu, he slices and dices!