I'm a big fan of SC1 lore and SINGLE PLAYER gameplay. SC2 was kinda cool but not as memorable. I play terran and zerg campaigns basically to see the lore and gameplay innovations, the spaceship lobbies, new characters and stuff.
As for LotV, I'm not feeling motivated to spend time and money in it, as the lore got so meh... (highly subjective, I know). So, do you think it's worth it from this perspective? Is the protoss spaceship and story cool enough?