It is good to balance out your riding. Spend some time trying new tricks, and spend some time refining and adding style to all of the stuff you already know.
If I were you, I would do these next...
Master all of the 180s
Heelside and Toeside Back roll
Toeside Front Roll
That ought to hold you for a while. After all of that you can start trying rolls to revert, 540's, and HS Front Flips.