I dislike the green wall syndrome...trees lining fairways.
I dislike crappy trees burying lovely trees.
I dislike trees overhanging fairways.
I dislike trees causing massive shadows on a brilliantly sunny winter day.
I dislike trees partially blocking views of features such as bunkers.
I dislike rough under trees.
I dislike trees with low canopies.
I dislike trees blocking interior views or views of where other golfers are...this is a safety hangup...I want to see what the idiots around me are doing.
Lets draw a line under trees.
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This all stuff I look at when evaluating courses. There are more, but I am feeling quite negative now
Ciao