I know you all are gonna hate me for this.
I have over 20 tanks currently in use, each filled with a different flavored juice. I diy, and I can't stop. I ran a coop for the polypropylene DCTanks, and bought 50 between Hubby and I. I also have several liquinators and lil mamas in my stash.
My flavors: menthol/spearmint, apple champagne, mtn. dew, lemon lime, peach, grape, watermelon, liquid amber, pineapple strawberry banana, banana cream hpno, citrus, tobacco, blue raspberry, sweet tarts, pear, tangerine, lemonade, key lime, apple pie, kahlua coffee, etc...
Hubby is a coffee vaper. I make his juice using my own coffee extract for flavoring. He has kahlua coffee, french vanilla kahlua coffee, mocha kahlua coffee, and hazelnut kahlua coffee.
So, In a nutshell, IMHO you're not going overboard. Do what makes you happy. I am.