For me the location of the FTO was important. I had applied from abroad (the Netherlands). Because Netherlands - London is only about 50-60 flying time and can be very cheap (the airfare to the selection days with Ryanair was 24 Euros for a round trip). FTE Jerez was considerably more expensive to get to if selected. So I had to choose between OAA or CTC. Further I looked at quality of training, but I think CTC and OAA are quite similar. I chose OAA for my selection days in January this year.
Got called forward for the selection days, I was very surprised. I was the only one on my selection day from abroad, where there many more people from abroad? Also I was one of youngest with 18 years. Unfortunately I didn't get through to day 2, I think if it opens next year I will choose CTC.