Well, if they hadn't died off, I'd be used to seeing them, so I would think of them the way I think of any other creature. The scary ones I'd be scared of, the small ones that weren't so dangerous I'd want for a pet, and the rest I'd want to see in a zoo.
Well here's my reactions: "YAY! Long neck dinosaurs! I wanna ride one!"8D "AAAAAAAAAAAAAAAAHHHHHHHHH T-REEEEEEEX!" *runs screaming* O_O "OH N0!! The 'Land Before Time' sinema hadn't been made!" T_T *runs to caveroom*