Hey bro - keep switching them out is my advice. I haven't tried unflavored yet, but I'm about to. If you keep to the same thing often, you'll eventually "lose the taste" of it. Don't wait for the taste to completely go away - you can always go back to it later. Also, try out things that you didn't necessarily like when you first tried it, of course. I just filled a
tank with strawberry lemonade, which isn't perfect, but I'll hit on that for a while until I feel like something else, and if nothing else, I can certainly taste it.

(I haven't sunk to the absinthe yet, but I will if need be.)
Keep an eye on that signature of yours. Keep getting back up. I saw it when you put it in and remember the circumstances, and it's a very wise and healthy outlook.