That's a pretty sloppy paintjob if you ask me. Though the color pallette looks good! Personally I think High Score looks more like a Sony controller. iDD
I've seen a lot of your re-paints, and while some are intresting to say the least. I think you need to get ahold of some better paints if possible, I've recently re-discovered Testors Model Masters paint i don't know why I didn't like them before... I actually prefer them over Tamiya's line of paints now. they go on much smoother and if you use the right brush you get no stroke lines in the paint when it dries. Also consider washing the parts you plan to paint and sanding down parts that rub lightly with a 1/100 small grit sand paper before painting, this way you won't get the paint flaking or cracking when you transform the figure or move parts. Seal the completely dried parts in Clear Coat/Cote or Future polish it'll do wonders to preserve your work in the future.
I agree, Model Master's ain't bad at all. And the spray paint, though not cheap, it some of the best around. Though you'll want to prime most surfaces first. Course, I never wait for it to cure before I clear coat it. But I like orange peel. Edit: Not too familiar with the High score figure. Is there a Master Chief head that'll fit the frame? I doubt the newest figures will work but maybe some of the earlier stuff...