I pretty much agree with the previous comments, but here's my 2Kr's worth anyway.......
I think Ovacik's a great base for a summer holiday (I've been five or six times) as you're equidistant from the attractions of Fethiye, Kaya Koy, Calis and Oludeniz etc. without being too close to Hisaranu!
It's a long way off, but I'm already toying with the idea of retiring to Turkey when the time comes, and my choice would be Calis, not Ovacik.
1. As said - I believe Ovacik dies in the winter. Very few people live there all year round, so there's no point in the local bars & restaurants staying open all year.
2. It is appreciably colder as it's half way up the mountain! Nice in summer, but I personally need as much warmth in winter as possible in order to keep my body and brain working.
3. Also, the dolmus service is severely diminished out of season - start later in the morning, finish earlier in the evening, and much fewer vehicles. I think the Fethiye/Calis service may be better?
4. Property prices do seem higher in Ovacik. I'll get flamed for this, but (to my untrained eye) the villas in Ovacik do seem to be built to a higher standard than Calis, they seem to be on bigger plots, and the mountain makes it much more picturesque. OK - you can get a sea view in Calis, but you'll pay a hefty premium.
So, for all-year living I think it's better to be down on the coast somewhere around the North/West side of Fethiye bay, and within easy access of Fethiye town.