I found this very difficult but over the past few years my two favourite holes are the 1st and the 17th on the Old Course.
The Road Hole is my lifetime most difficult hole to par or birdie, and yet someone in our fourball, with a higher handicap, always pars the hole (Gordon Murray always pars the hole and he's a 15). I actually hate the hole but love playing it!
My favourite hole though is the first hole. The conditions always vary, I've hit 6 iron wedge and driver three wood. The hole looks so simple but your tee shot has to be well left if the pin is front or middle, on days when weather is not a factor (rare). The green appears simple, most putts are straight although none look straight. The byrne in front requires serious consideration, I've seen so many balls end up there after great looking drives. I've seen 4 players hit it OB right on golf's widest fairway - one day I had to knock down a three iron starting at the bridge on the 18th fairway, in order to avoid going OB right. On paper it's a birdie hole, and it can be, but nothing is automatic on the Old, on any hole.