Forget sequences and standard chord progressions because they've all been used a thousand times and leave little on the originality side of things. An excellent excercise would be to learn new chord scales based on the minor scale and melodic minor, then arbitrarily extract some of those chords (and this can be done with major chord sequence you already know) and play them in some sort of sequence. another idea is look into modal chord progressions as this will take you in a whole new direction. Try and be creative and you'll avoid a rut as well as keep your playing interesting. You obviously understand the theory now apply it your own way with respect to chords and you'll begin to develop your own style as opposed to sounding like a thousand other guitarist. Remember you can play any 2 or 3 or 4 chords together and they form a progression, it just depends on how "musical" it sounds to you. Avoid the tried and true and carve your own path that would be my advise. To see what I mean check out "The Mahavishnu Orchestra", now that is taking chords into a new direction.

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