The freedom of writing for Enterprise.
The main thing, really, is the context of the time, the way people were back then. They're more or less like you and me. In a situation where we discovered aliens - we would probably freak out and our first impulse would be to run the other way if they shot at us.Everything will be very strange. The crew will not have a lot of the protocols and technology that they need to even do something as simple as visiting an alien ship.
Picard and Janeway would just waltz aboard an alien ship or waltz down to an alien world wearing than spandex suits, as if nothing was out of the ordinary. We're going to have to wear space suits, we're going to have to go through strange decompression chambers to get aboard alien ships. We're going to have to really struggle to make the kinds of discoveries that the other crew makes. Everything will have a slightly different feeling to it.
On the new show, we have a character who's a linguist, because the universal translator only works sporadically. We're immersing ourselves in linguistics now, to try to create new alien languages.