Its a tough choice here. Ill have to pick one. Anyways, Brooklands gets my vote. Why? Its an old race track, opwned in 1902, way older than Sitges-Terramar. Its a very challenging track, with very, VERY banked turns. I would love it if they bring back Brooklands, so people can race on it.
Looks like Brooklands will win so I choose for Sitges Spain! Much better weather and that track can be rebuild maybe by Fernando Alonso he is able to buy it in the near future and restore to it's original glory....
I'm not sure I can be unbiased here, because I've been to Brooklands many times and have more of a heart for it than Sitges Terramar... but, hey, I'll add another vote for Brooklands!
Sitges, because the layout of the circuit is still complete. It is admirably preserved. Unlike Brooklands. Even around there are no constructions. Nothing to do with Brooklands.