It was odd how different it was from how the same trip would've been if we'd gone with my parents rather than J's - you'd think a trip to the seaside is fairly standard but not really. We'd've taken sandwiches with us rather than had fish and chips (we rarely had chips when I was little which is probably why I like them so much now). We'd've probably gone to find some beach to walk along or sit on, rather than look out over the harbour - and then definitely gone to visit the castle, rather than go for a pint. Given my parents don't have a dog they'd need to let out we'd've then gone for some food in a pub a little later, before heading home.
Neither is better than the other as a way to spend a day (I'm quite happy with both :) ), they're just completely different. Some of the differences are because J's parents can't walk as far as my parents so a walk along the beach wouldn't appeal (my parents wouldn't count it a decent walk unless it was at least half an hour), and of course the need to get back for the dog affects things.