I am having a similar problem with my US coins. No direction at the moment. I have Morgan, Ike, SBAs, Sacagawa and Presidential dollars, modern issue 1/2 and 1/4 dollars, dimes, nickels, IHCs and LHCs. Where to start?
Gees, I hate to say, but my whole collection, paper money, rare coins, gold, ancients, Scottish hammered, USSR coins, Ukrainian coins, Australian coins, Portuguese coins, Portuguese banknotes, Spanish banknotes, it is all no direction. I pretty much have given up on direction. I buy things just cause they look nice and I wanted one, not because I want it to be part of a theme. I have themes though, females on banknotes, Scottish coins, but I also have serious areas where I have purchased a single coin that doesn't fit in with any other collecting interests I have:

I don't collect much English hammered, but dang, this is lovely. Couldn't live without it when I saw it. I think I sometimes buy on impulse, but far from regretting it, I still love this piece and love staring at the image of it. It was a PILE of money, many months of work to a labourer in 14th century England, and something only a Noble, a Knight or a Monarch or rich merchant would have had.