Aged gouda is one of my favorite cheeses. Unfortunately, I can never remember what brands I get, but I've tasted everything up to 7-year gouda. In my opinion, the best balance between flavor and texture is at around 4-5 years. There's a 5-year old gouda I get from Sam's that comes from California, I believe, that is simply outstanding. It has a beautiful whiskey and nutty aroma. It's dry and intense, but still retains enough moisture that you can slice into it with a knife and not have it crumble all over the place.
I also like gouda because it makes an easy, crowd-pleasing cheese spread. Get a fresh gouda, and a couple of aged goudas (one 3-year and one 5-year, for instance), or perhaps throw a smoked gouda in there as well, and there's enough of a range of flavors to make everyone happy. Also, comparing the progression of flavor from young to old makes great food conversation. Most of my friends are not foodies, but something as simple as this can bring out the taster in everyone.
I used to poo-poo goudas a bit because my only experience with them was with the younger, blander types most commonly available in supermarkets. Now, I think they are a very versatile and interesting cheese with a remarkable range of flavors depending on how long they've been aged.