Total War games. Draw me in incredibly, even though after about the first 2 hours of every campaign they usually become 99% boring. And I know this, but I’ll still get Total Warhammer on day of release, even though it’ll inevitably be completely broken and need 6 months of patches before it works.
(Empire’s the only one I escaped, something about the interface and regions just put me off instantly. OTOH, Medieval 2 gave me one of the best strategy game experiences ever- the plague hit, and ruined all my plans, and killed all my generals, and caused total chaos and I hated it til I realised it’s the bloody plague, if it doesn’t ruin all your plans it’s doing it wrong. And then I loved it.