Tough choice.

I like WGT, especially after the Imperial City event. Nothing gives you that feeling of knowing and mastering a dungeon more than running it repeatedly for a week. It’s challenging enough that you will spend time learning how to overcome it, but very satisfying to master. Still I’m not a fan of the final fight.

DoM has some drawbacks. The horrid Tharria woman, the clumsy attempt to shoehorn a story into a series of dungeon boss fights, not one but two incomprehensible fights, long, long, long trails of ad pulls with dreary one-shot mechanics. But it does have the fun AoE Nerid boss - a clear mechanic that requires a certain amount of footwork to overcome. And the fantastic Symphony of Blades, a well designed, boss with clear mechanics that are challenging at both vet and HM levels.