Id have to say its a 3-way tie... I love Hole 1 - maybe just because its the first hole I hit after hankering for some play all morning... or maybe its that every position is birdie-able... I just always look forward to the first throw :) Hole 4 is great because it lets you open up a bit, without needing a monster-arm (which i dont have) and gives you multiple elements in one - trees (some), hill, distance, wind... Love it. Finally, hole 17... I know its a drag to slam into a tree 5 ft into your drive, but if you find a route that works, hole 17 can be one to look forward to every round... and beleive it or not, it can be fairly easy to recover from a rough drive on the upshot, since its a pretty short hole... besides the tree army to fight through, its bread and butter :)
Really, Morley is loaded with wonderful holes... no wonder its gotten so crowded over the past decade!