Well we've done both, owned and now renting. We didn't really have any problems with the actual purchase it was the constant hassle with neighbours who were renters not wanting to pay their share of the costs for the pool/garden etc. It was always "ask the owner", who would then say "ask the tenants", you just couldn't win.
As others have said at least if you have problems with a rental it's much easier to just move than if you need to sell up first. And if for any reason you need to return to the UK to live there is nothing quite so portable as cash.
As Scunner says though a Turkish landlord is not nearly so accommodating as an English one, ours showed us everything working when we moved in and said "I give it you working, you give it me back working". However we had only been in the place a month when the hot water tank started leaking into the attic bedroom, we knew he'd had the problem before (as evidenced by the water marks on the ceiling) so we called him out and he did get a plumber to sort it at his expense.
The only downside to renting is that you can never feel that your home is permanent. Lots of things would need to change in Turkey in relation to inheritance laws etc to temp us to buy again.