Christmas gift for boyfriend?

So I’m having trouble thinking of what to get my boyfriend for Christmas. We are pretty serious now so I really want to get him a “nice” gift. For my birthday a couple months ago he gave me this diamond necklace, and I feel like it’s so much easier to shop for females??

I was thinking a nice watch, but he already has a really nice watch. He’s a gamer so I thought maybe something related to that, but nothing seemed very sentimental related to games? He also is a big car guy as well so I thought maybe something for his mustang but I don’t know much about cars either. I thought maybe like a really nice business/work jacket?

I have no idea!!! Would love some suggestions or gift ideas if anyone has any? He is 25 if that matters.