New group to bond in strong roleplay environment

GM for 30 years, newly started a roleplay group, playing Saturday fortnightly at the Aldershot games shop. This is not a D&D group, we use a light rules system in a homebrewed world that is dark, gritty low fantasy. I have three players, open to having a few more. The players have some leeway to be creative with their background and the parts of the world they are from, so they can invest in building the world, and in narrating part of their own adventure. What's important to me is that players can commit and want to roleplay in a the game I've described. Magic is not a common part of the game, while it is fantastical, magic is special and surprising. I've GM'd many systems over many years, and run many long lasting campaigns. It's totally possible we might branch out and have other campaigns running. I'm interested in scifi (particularly Traveller or Star Wars) too.