I can't stand the Lemon one (far too "chemical"), the Diet Vanilla Coke however is great (though it tastes more of Cream Soda than Coke).

As I said : Colours and tastes... I can't stand the Vanilla coke...
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Riocar 80gig S/N : 010101580 red
Riocar 80gig (010102106) - backup