This conversation around UK #1s, biases and such is quite an interesting debate, as I think there are really so many factors that play into it.
For starters, it all depends on what sort of ride you like. If you’re into airtime-based experiences and love a good hyper (like me!) then I’d like to think that Hyperia has a fairly good chance of being your top UK coaster. But if you’re more into positives, then something like Nemesis is likely to still be more your cup of tea.
Biases is also an interesting point to consider. Someone further up the thread mentioned that this particular site leans pro-Alton and pro-Europa, which I think is an interesting point to consider. This is not a bad thing, and not through the fault of any individuals by any means, but I think it’s fair to say that this site, being an Alton Towers and Europa Park fan site, may not necessarily have an entirely unbiased view on some rides, to some degree. While TS seems more subdued than other internet sources on Hyperia, I’d say that it isn’t on Nemesis Reborn and definitely isn’t on Voltron. My point is that you may have less folks on here raving about Hyperia and declaring it their new UK #1 because there may be more nostalgia and love around these parts for Nemesis, for example, than there is elsewhere on the internet. Like I say, this is not a bad thing and not the fault of any individuals on here, but I think it’s just inherent in the fact that we are a site centred around two specific parks (Alton and Europa). If you go on, say, Thorpe Park Mania, that will probably lean the other way to some degree, as that site is bound to have a bit of a pro-Thorpe bias from being Thorpe-centred.
It is interesting how it varies so much; I’ve seen a good few saying that they prefer Hyperia to Voltron (not so much on here, but definitely elsewhere), and I’ve seen others saying that Hyperia isn’t as good as Icon, or The Big One.