Most auto flowering strains do not like to be topped as it interrupts it's finite lifespan. Any plant that can be manipulated with the photoperiod will do fine with topping although sativa dominant plants can get very spindly and break under the weight of the flowers unless the side branches are supper cropped and strong or tied in place. My first atempt at topping a tall sativa resulted in a plant that needed to be either hung so the buds could dangle or be tied up, it ended up looking like some sort of ivy until the buds filled in... LOL