I like a balance between the two - I think we got it just right on our honeymoon, when we alternated days exploring with days spent lounging around. I like to explore where I'm staying but having some time to chill is all part of being on holiday.
I'm not a huge fan of the beach...but I don't think anyone would ever say I'm into action / adventure. We love to go camping and do plenty of bushwalking, interspersed with a good amount of lounging around. Before we had kids hitting the wineries was always something we'd do!