It's always nice to see modding going on in the community, but if you want to create some original stuff, you have a wealth of options - Unreal and Unity are two of the most well-known ones. But one that got brought to my attention lately (thanks to postings made by psych0fred on his SecretSociety board - check the Downloads/CORE folder) is the CORE Engine. It's built off Unreal 4, and it's also very much geared to quickly making good-looking, playable games. It uses LUA - the same type of scripting we use in SWBF modding.
Check it out here: https://www.coregames.com/create
Bear in mind it does have its limitations (primarily you can't use anything not created in the CORE editor), but it's a good place to start as far as making your own games goes. I'm going to be looking into making one of my first non-university games using CORE.