I'm a big fan of TCGs such as Magic: The Gathering and Hearthstone. I started playing M:TG as early as 1999 when the first set of Chinese cards were introduced to the world. My favorite format is draft/sealed in M:TG and arena in Hearthstone, where players can show their 'skills' regardless of how rich they are in real life:). The word 'skill' is quoted because sometimes you get a big bomb and can just run away with it, but that's better than getting consistently beaten by imba cards/sick non-interactive combos!
My biggest strength and weakness in terms of gameplay is that I value "value" too much. If you know a bit about TCG strategies, you know what I am talking about! I would always hate to pilot a red-burn (MTG) or face-hunter (Hearthstone) deck!
Because MTG is so expensive, I've even created tools for my friends and I to simulate-draft Magic booster packs online, much like the drafts.in app. My app had a better looking UI than theirs! However, it's impossible to dedicate myself to update the app and the project has since been obsolete.