I've only seen about half of the OVA series. It's very pretty and well-executed, but if you've played any Japanese RPG in the past fifteen years, you know what to expect (and the same goes if you're familiar with D&D). But still, it shines through today better than most RPG plots do, since I'm pretty sure it was what influenced them. It's sort of like encountering Tolkien after being exposed to stuff influenced by it: the parts that have been copied a million times over are much stronger and more memorable in their original form (though you can hardly compare Lodoss to Tolkien, what with it being twice removed from it [Tolkien -> D&D -> Lodoss]).
I appreciate the series, but it's not something I can really watch for thrills on its own. Honestly, it puts me to sleep.