I'm old school.... I like my boar bristle roundbrushes!! Rollers, clippies(double prong roller clippies and duck bills), hard rubber barcomb, blow dryer, GK straightener & irons, Shears, razor, wire tail comb and lift pick.
If you have a good "handle" on the basic tools, your world is wide open. You'll see tools come and go, gimicks and tools that promise to make life easier, but the tools that you have mastered and are comfortable with will be the ones you can't live with out.