I love seeing the results of glaze tests, but I hate the slow process of making dozens of different glazes and applying them to test tiles.. Thankfully there is a more efficient way, at least for tests that have continuous blends between two or more glazes.
Aim to make the best content you possibly can, and think more about the quality of followers than the quantity.
It's always hard to know what to get someone for Christmas, but the good news is there's no shortage of options when buying for a potter.