It does not matter at all.
FIll Factor is only taken into consideration when an index is rebuilt (reindexed).
If you only drop and re-generate the index, as you mentioned in your post, the fill factor value would not make any difference.
BTW, since SQL 2005 Fill Factor 0 meant the same as 100.
In one of the later versions Fill Factor 0 is removed completely.
_____________
Code for TallyGenerator