Thanks all.
@Smyslov [OR ANYONE WITH INPUT]: Two questions.
(1) Why do you say you are not so sure that open Spanish is a good long-term choice?
(2) What are a few exemplary openings that might be better long-term choices (perhaps after one is more advanced) in your opinion, and why?
I'm not so sure because I basically know a little about 1 d4 openings and much less than that about the Spanish. However, the Spanish is often a rather closed opening for 1 e4 and it seems white has good chances keeping it that way and limiting black's counterplay if possible. Hence Fischer's favourite ploy of keeping the centre closed and attacking with pawns on the K side, often directly preventing the open variation, which might tend too much towards simplification. My recollection is that white keeps a small edge and black, when he goes into the open variation, may not have as many chances as he or she would often like. Could be wrong here because it's a long time since I played K-side openings.
What is your opening rep like?

Who are the great champions of the Open Spanish ?
Yusupov defended a fair number of them, including against Karpov and Kasparov.
He's an interesting character with an unusual taste in openings.
Perhaps he is an unusual character with an interesting taste in openings?
Would you elaborate?