He was more complex in the first game, I think, once you get by the bad writing and very questionable voice acting. At the very least he has some emotional development. He goes from "HOT WOMEN DRIVING MOTORCYCLES THROUGH MY WALL = TOTALLY NORMAL" to confronting Satan underground and absolutely worrying about it. Also crying a few times. Also guilt at killing Vergil. I remember wondering if they were going to kill Dante off, things looked that bad for him. Then I remembered it was a Capcom game. He's still interesting in the later titles, I guess, but I know he's so "cool" he'll get out of whatever situation he's in. I care about him less as the series progresses D: