I played Magic as well, but got out of it around Urza’s, when it became “(s)he who gets their combo off first, wins,” which isn’t my jam in CCGs.
I find it really neat that there’s a lot of crossover here between Doomtown and 7th Sea. I’ve never played 7th Sea, and I don’t know that it was ever popular in my playgroup (we stuck to Doomtown, Shadowfist, and a bit of L5R). Maybe I’ll scope it out.