I always found the most challenging thing in Photography was the next think I was going to photograph. What I had done was in the past and behind me, the future was always a challenge.
The most challenging thing is surgery.
the most challenging thing is getting everything right! you get one thing but then another just slips away.
the most challenging thing i had expereinced in my life was when i got drunk it was not that easy because i wasa not prepared.
probably the babies dying would be the hardest part of that paticular job
Paper writing.
If you have your own practice, the most challenging thing would probably be dealing with the insurance companies because in today's world you will have to really jump on insurance companies when trying to get their payments. If you don't have your own practice, it would probably be very worried parents. :)
Leaving my boss breathing.
the new york times (apex)
There are numerous templates available for photography. You would have to select the one that is most appropriate for your needs, depending on the type of photography that you interested in. Tripwire magazine online have a list of the best 50 templates available and I would assume that one of these would be suitable for your needs.
Most people like photography because it is visually pleasing. Technically advanced people may enjoy the technical side of photography, while artistic and thoughtful people may enjoy the conceptual side of photography. It really depends on what type of photography you're talking about.
The most challenging trail at Whistler Blackcomb is the Couloir Extreme. Another famously challenging trail is the Big Bang. The most challenging trails are these two.
You think that the most challenging part of this unit will be?