Rod Lengths for Ceiling Fans and Mini Pendants
You're pretty close on the fans. On the 10' ceiling I can also see even keeping the stock 6" rod, if it came with one. If all the fan came with is the stubby 3" rod, a 6" would be fine as well.
As for the pendants. I keep them just above average eye level for placement such as this. With a 10' ceiling I would keep the rods/stems to 36" or less. That would keep the bottom of a typical fixture at or above 6'.
Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.