Matinee, some really good work here, mashallah. How long did it take u to do one whole arm / palm, just out of interest. I often get asked to do mehndi for friends etc, but I find that my attention tends to drift off after about 5 mins after I have barely started. Its nothing like yours, yours have a nice flowing common pattern and a good density. Mines freestyle.
I don't often look at a pattern, unless it's one I've drafted up specifically for a bride. Those (expect for one), were done without referencing a design.
It takes anywhere from 25 minutes to 45 minutes to do a full arm like that. The Indian bridal style took a bit longer, but then I was sitting on the floor in an a very uncomfortable spot!
I'm able to concentrate throughout the entire thing. I've done brides where I've sat for 7 hours straight (with one 5 minute break), so I've trained myself.
P.S. share your work! :D