usually gameplay get's me in the door honestly, so I wanna see that stuff first. that and overall presentation. I'll explore the story once that other stuff hooks me. and yeah, you don't wanna spoil too much in a trailer. Final Fantasy 15 comes to mind with showing to much in trailers story-wise.
I feel like banging my head against a wall every time I want to find that post that shows all the plugin header codes. Then I think "next time I find it, I'm going to bookmark it". Then I think "wait a minute ... maybe I bookmarked it last time because it took me so long to find it". Check bookmarks, and there it is