MLP, Communism, Rock Collecting, Gardening, History, Maps/Geography, Playing city building games, Listening to music made by Billy Joel, and of course ponies, ponies, and more ponies!
No I do not, I have Civilization 5 & 6 and Europa Universalis IV for strategy-based games and such but I've never played Hearts of Iron before. Sorry Comrade
Considering your interest in WW2, communism, and Paradox games, I'd definitely recommend it. There's even a stellar MLP overhaul mod for it, should that interest you.