Personally the way I look now is not different due to meth use, but I hardly use the stuff anymore.
In my period of heaviest use I was very skinny, pale and generally unhealthy using. It is hard to pin it all on the meth because I was sucking down several grams of weed a day aswell as munching E like skittles and huffing nitrous like air. Obviously these other things contributed but meth was probably the biggest factor, maybe the weed too because I was smoking a LOT and it does make you skinny as fuck.