I can only speak of the area I have property in, Punta Prima, had 3 houses, sold one in no time at all, I have never agreed with buying of plan, a loverly picture of what a place would look like isn't for me, but I know many do and still would do.
I cant relate to no brits about either, we have a restaurant that we like run by a German couple, Mrs B is German, see the connection, Brits, Spanish, Dutch, you name it they come in to eat, we often have a breakfast their, again many different nationalities, the supermarkets you hear many different talks, the main property we use for holiday has a great mixture of people, some live 24/7 some like us.
Never had any problems with bumping into other brits, these buggers are everywhere.
Never ever had the feeling of being alone either, summer or winter, in fact the many times we have been in Spain at Christmas has been one of the best times ever, in a Chinese restaurant one Christmas Eve (La Siesta roundabout) having a real good jolly up even some Spanish people joined in, and if they didn't like us Brits they certainly never showed it.
Sure property is all over the place, it always has been and always will be, look at England right now, months back put a house up for sale Friday, sold over the weekend, now I see great houses at decent prices up for sale for months.
I can speak Spanish yet when I start speaking this most Spaniards talk back to us / me in English, guess it's the look of me.
Could go on about Spain for ages but no point as it's always 'Horse's for Course's' but I do know one thing for sure, don't like it, shut up and get out.