Very much into F1, never been to a race but it's looking more likely that I would do a European race weekend as the cost for the British GP is quite high in comparison. I could do a whole race weekend at Spa for the cost of race day at Silverstone.
I have been to a WEC race, really enjoyed it and semi follow the series, usually through youtube now.
Aussie V8 Supercars is an awesome series and some of the best wheel to wheel I have seen outside of 90's BTTC!
Porsche Cup series (it did support WEC in 2017, not sure if it does now) is another great series. I think I mostly prefer tin tops/GT racing
I do enjoy things like Daytona/Spa 24 hour races when they're shown over here for free, quite often streamed on youtube now.
On a side note I was heavily into Sim Racing a few years ago (before we needed a bigger house!) and there are quite a few professional racers who use services like iRacing, I've raced in races with a few WEC drivers among other series.