My family most often uses Hulu. We also have access to Netflix and Prime Video (both of which I had previously used to watch episodes of the Lego Ninjago TV series), but Hulu is the one that I use by far the most, mostly to watch certain shows on live TV on most days of every week.
I've never had a chance to try any of the other streaming services listed in this poll, even though Hulu can be bundled with Disney+ (my dad's excuse for not getting Disney+ is that there's hardly anything it offers that anyone in this house would be interested in seeing, despite his interest in watching all of the Marvel movies and shows).
For me, personally, I'm also very interested in possibly getting Discovery+ at some point. At only $5 per month, it's certainly more affordable than most other streaming services. I guess the only reason I keep putting it off is because I only really have time to watch shows as they come on the live channels, and Hulu already has that covered for me.