Paul:
Interesting you bring this up. Early on in my pool "experience" (rather than say "career"), I'd had a cue like that (an all-graphite one) for the same reasons -- "hey, if they make fishing rods and fighter jets out of this stuff, it probably is more than qualified to make a really tough cue." It actually played quite well, and darn if the thing wasn't truly indestructible (I put it in my car's trunk, knowing that graphite isn't vulnerable to the same things that wood is). I actually ended up selling it for much more than I purchased it for (even after owning it for a couple years), because some player that I let borrow the cue, fell in love with it, and wanted it right then and there for the same reason -- a good cue he could throw in the trunk for hustlin' purposes.
The interesting thing with graphite is that man is in complete control of it, unlike wood. Man can weave that stuff into any shape imaginable, and can make it have just about any property he/she wants. Carbon/graphite is extremely resilient, doesn't warp (they make the F-117, B-1, and F-22 Raptor out of it, and that stuff has to endure extreme physical and temperature conditions!), doesn't corrode/discolor, and doesn't need maintenance. The only downfall? It doesn't have the perceived "feel" of wood. But remember, wood is wood, and each and every cut is unique. There's no guarantee that two cues made from the same block of wood -- much less from the same tree -- will have the same look or feel. It's just the luck of the draw. Graphite, on the other hand, can be engineered to have any feel that the designer wants -- it's all in the weave and the grade of graphite used.
Thus then, why hasn't a line of custom high-end cues made of graphite appeared on the market? Perception. It's perceived to be "cheesy" and no high-end or reasonably reputable cue maker will go near the stuff. It's a shame, actually. Imagine a workhorse cue that has the "feel" of a wood cue (or perhaps a feel even better than one -- man can certainly engineer that), but yet is indestructible -- no warping, highly ding-resistant? Granted, Mother Nature certainly does have the best aesthetics when it comes to wood -- there's nothing more beautiful than a cue with grain properties that bring it distinctive character. But foregoing grain properties, graphite can be made in any color (Henry Ford's Model "T" motto of, "you can have any color you want, as long as it's black" doesn't apply here), can have any designs integrated into the weave or inlays cut into it, etc.
I'd say don't worry about what the naysayers/old-schoolers/purists (fundamentalists?) try to impress upon you. If a graphite cue is working for you, you have a cue that's going to last and last and have a consistent feel every day -- not vulnerable to environmental conditions as wood is. And, as others have stated, this cue might attract you some action, if this interests you. If you really play well with it -- which it sounds like you adapted to it very quickly -- you'll really mess with your fishes' heads! Remember, Efren did some of his early career's best with a $10 cue (halfway down into
this article there's a good writeup about this).
Hope this is helpful!
-Sean