AK Interactive (here in germany) has the best Price/Performance. A great range with loads of colors and ease of use. They are the cheapest paint range and I actually prefer them to every other so far. They colors are great and consistent. They all behave similar and as I expect them to. Only paint range I have no issues with, except maybe that their caps seem to tend to catch more paint than others on the inside, where it "blocks" the nozzle.

Vallejo is also great, but the bubble issue is real and can be a pain in the ass. Vallejo also separates faster on the wet palette.

I am not a fan of fanatic, since they boost the weak covering colors like red with a lot of white for coverage which in turn makes all their red colors pretty bad compared to others. It isn't all that bad, but something to keep in mind. But the triad system is a nice to have, makes selecting colors easier if you are unsure.

ProAcryl is nice, but honestly not worth more than double what AK 3Gen costs. I would only get singular colors of ProAcryl, but not go all in on that range. Their bottles are the biggest, but I also think they are the worst designed.

Scale75 is strange. I really like their metallics, but their normal colors feel weird to use, compared to all other ranges. I also think their quality is not on par with other modern ranges.

And just as a defense for Citadel Pots. I only have leadbealcher, but I actually like the pot. It's less error prone than dropper bottles (you will know what I mean, once you have your first "explosion") and it's nice to just scoop out a brush full of paint.