I'd love to learn Arming sword & Buckler and (maybe German) Longsword sometime. My scope of interest changes from culture to culture all the time, so it's hard to pinpoint some favorites.
Maybe a few are the Falcata or Kopis, Oakshott type XIV sword, the triangular blade is so cool to me. Bastard/Longsword (depends on your interpretation), and I've always been a fan of big things like the "Zweihander" but they're so unwieldy. I've always liked Shamshirs too, but not their style of use. Backswords are cool, moreso arming swords with the more intricate handles, but I haven't been able to find any online.