I hate necro-ing a thread, but the last few messages on here really sparked me... I love the concept of X3: Reunion, with or without the mods, but as denyasis says, the UI is horrible. I had to stop playing it altogether because it's an excercise in frustration, irritation, anger, and tedium trying to use their UI. Worst UI design I'd ever seen in a game, or anywhere for that matter... And as I said, it's a total shame because it's a great game in concept.
Wow -same with me. I loved the idea, loved the dynamic universe, corporation building aspects. But the UI is just such a letdown. It effectively prevents you to enjoy all but simplest aspects of the game (single fighter combat is only thing semi manageable).
I think egosoft lost many players to their horrible UI, but ,sadly fails to admit that ( devs constantly pinch that there is nothing wrong with interface)