A quick note about Doha Airport for spotters.
The terminal is still quite small here, so until the larger facility opens these facts are correct.
Once airside, the transit lounge/departures area have large windows overlooking the ramp. During daylight hours you wont have any problems logging any movements as the runway is pretty close. Some remoter stands may be a problem.
At each end of the terminal is a vantage point which looks over a little bit more of the parking areas.
As most passengers experience a bus ride to their aircraft, this is another opportunity to note a few aircraft parked away from the terminal.