It's always listed in one's contributions. Now people do in fact tend to list the pages they have created.
It's fine in my opinion but I don't think one should get carried away. The ideal basis of fandom is that this is a community project and a community effort. Even within the 4 year current lifespan of this wiki, 15K pages are not solely maintained by staff alone. Everyone is involved. Yes, there are those with significantly higher contributions than others. Antvasima, Ryukama, and Matthew Schroeder for example. However, the basis of the wiki, the tiering system, was revised / rebuilt from the ground up by DarkLK, who has far less edits in comparison to the aforementioned, but has considerably just as much contribution if you know what I mean.
In conclusion, yes, you may. Anything not harmful or derogatory can go on one's personal userpage, but no one owns a page, that is community property, you own every contribution you make, meaning no one can take credit for a contribution you made, but the community can revise any edit you make which kinda voids the point of listing even notable contributions on your userpage but that doesn't mean you can't, just to summarize that whole thing.
