DS's interests were commented on at his first secondary parent's evening and his Art teacher was thrilled that he's into Warhammer, and not solely into gaming like many of the boys he teaches.
Every report and parents evening DS has always had comments about his curiosty and general knowledge. A lot of this is to do with his autistic attention to detail, but he likes a lot of historical, geographical and scientific knowledge and is keen to share it.
This does not win him many friends, nor does he care. At primary it was gaming that he did make friendships over. At present he's not socially motivated.
I wouldn't like gaming to be a sole interest, but it's not a total void either. Depending on the game there can be planning, strategy and life knowledge. It's often surprised me how much general knowledge they've got from games like Minecraft. The redeeming point of Fortnite is a bit of musical culture- it nearly compensates for the shouting and inane slang.
The sports and activities my DCs do don't particularly make them interesting. There's not that much to chat about swimming lengths, but it at least keeps them fit. Scouting is better for life experience. For DS1, these are things I inflict upon him. DS2 gets fired up by running and events that he's done. It's more places they've been, things they've done and knowledge they've gained.
Neither are readers, and not for the want of trying. I've made some gains with audio books for DS2. They get a lot from youtube and Newsround. Not all screen content is bad.
As young children, screen time was CBeebies. They were in school before we got smart phones and tablets and are about the last of that cohort. Their play was mainly trains, construction toys, vehicles, dens, sticks. Going out involved a lot of babble. Of course this still goes on, but there is also a not insignificant number of young children who have heavily screen-based lives which is a new phenomenen in this form. At least CBeebies was varied, designed and vetted content.
I've worked with thousands of young people in the past 20 years in different contexts. Some are naturally more interesting than others. There has been a general shift of attention span in less than a decade and general knowledge. Young people are the product of their environment. Where they've been dulled by a world that's very screen-based, risk averse, corporate, regimented (school curriculum) and financially restricted, that's not their creation. As a parent, it can be tough parenting within those parameters. My two are lucky to be in a better position than average, but it's still hard to resist external influence.