I think it's a good idea to have a mix of both, know where you want to go and want you want to do but also not really plan it.

This year we only know that as a group we want to do a boat trip, probably aim for mid-holiday, go to Mozaic Bahce (this will be planned for the parent's anniversary) a jeep safari for us four younger ones, and most likely a trip to the fish market at somepoint.
Otherwise, the rest of the time will be spent relaxing by the pool or beach, dinner then going to a couple of bars for drinks. I remain optimistic that I will do the walk from Fethiye to Kaya Koy, but weather/heat depending!
But I admire the planning Robw! Maybe in May one year I would try to achieve your list!
