Like you, I buy Coxes when they first appear, russets for the novelty during their short season, and Braeburns when there's nothing more exciting on offer. I can always be tempted by an apple I've never met before, especially if it doesn't stress how sweet it is...

In defence of the Golden Delicious: I'd not buy them for eating, but if you want an apple which doesn't collapse in cooking - for a French-style tart, for example - it's a good option.