[quote=@Willy Vereb]
<Snipped quote by Keyguyperson>Calling for aesthetics would feel like a buzzword made to fit one's own subjective view and pretend there's some truth in it.
Aesthetics is the same bad excuse we have for fantasy gun bans and other ridiculous actions because the person in charge would suffer from limited imagination.
I am talking in general terms here so don't worry I don't really accuse anybody. Just disagree with limiting creativity only because that doesn't fit one's narrowed down idea on the genre.

Aliens in steampunk. You can make a case against it, even if it isn't exactly right. Arguing that a piece of technology which was long available by the chosen time period should not be used due to arbitrary reasons? That's pretty hard to justify. Especially when introducing things which were never even thought about back then.
As I said about the only way steam engines can propel aircraft if they are the steam equivalent of turboprops.

[/quote]

Yes, this is subjective. You're dealing with the subjective imagination and creativity of an entire group of people, and the majority in the group thinks that martians and jet engines don't match up with their vision of this world. At the end of the day, I'm gonna cite Democracy. Strike a compromise for now, so as to not ruin the immersion of your fellow RP'ers. Down the road, as the story (and the technology) advances, I'm open to anything. For now, though, please keep it in line with the stereotype that is upheld by your fellow players. Canvas biplanes, steamboats, zeppelins, souped-up blunderbusses and rifles. 

If what you want from an RP is aliens and jets right off the bat, go make a Forbidden Planet/Barbarella RP.

You can keep arguing, but that's the verdict of both the GM, CoGM, and of your fellow player. I say, you can work them in down the line (preferably not in Africa or the New World), but not now. You gonna take it or leave it?