@elproducto, you mentioned styles you've brewed dozens of times. Are they brewed pretty much the same, or do you mix things up a little? Try to brew one of those again, but change one variable. I mean REALLY CHANGE it. Perhaps pitch a yeast that's not within the style, or use some off-the-wall hops. How about making your recipe as before but adding some herb or fruit? Forget about the BJCP for a while, do something adventurous and make beer you want to drink. The brewing-fu will come back to you.
I can relate to the "house mouth" thing, and sometimes when I brew something for the umpteenth time, it begins to lose its luster. It also happens to me if I brew two sort of close styles in succession, like blonde ale then Kolsch. I pour one then the other and they seem about the same to me. Now I try to do a brewing schedule where I bounce around and maybe go from a Festbier to an Irish stout to a Belgian Tripel, and so on.
I can relate to the "house mouth" thing, and sometimes when I brew something for the umpteenth time, it begins to lose its luster. It also happens to me if I brew two sort of close styles in succession, like blonde ale then Kolsch. I pour one then the other and they seem about the same to me. Now I try to do a brewing schedule where I bounce around and maybe go from a Festbier to an Irish stout to a Belgian Tripel, and so on.