What number for basketball should i change to?

i have always played as #21 for my favorite player Tim Duncan but the school i just moved to the star player wears number 21 so i wont be able to get it. im known for my aggressive post skills and rebounding my freshman year i was nicknamed Birdman by my coach after Chris Andersen and sophmore year i moved to a differnt school where i was nicknamed Worm2 after Dennis Rodman. now going into junior year i have moved yet again (army family) and just playing with people over the summer and going to my schools camp stuff they nicknamed me "The White Dwight" after Dwight Howard and my schools summer team that i played on this summer i wore number 4 for Chris Bosh. i dont know what number to wear next season and i prefer a number that i would be able to represent based on my skills.