What to build next

Despite its flaws, big fan of the game. I play pretty casually and don’t get high in the ranks but I play consistently enough that I’m able to build a new deck every month or so. Looking for recommendations, so far I’ve played:

Ancient Gear, Armed Dragon, Archfiends, Arcana Force, BLS, Blue Eyes, Branded, Crystal beast, Cubic, Cyber angel, Cyber Dragon, Cyberdark, DM, Darklord, Dark world, Dragon rulers, DDD, Dogmatika, Gladiator Beast, Gren Maju, Hero, Invoked, Kaiju, Lair of darkness, Megalith, Monarch, Purrely, Predaplant, Relinquished, Skull servant, Sacred beast, True Draco, Thundra, Vampires, Vendread, Volcanic, Yubel,

I don’t think I have a water deck, so recommendations for those would be nice!