Am at season 3 now. I love it! It's so good!!! Love seeing the early days of Starfleet. I watched a TNG video on YouTube just now and I could enjoy TNG so much more because of the depth provided by ENT. You can really see how far they've come, comparably, it's great. I think ENT is my second favorite Star Trek series, after TNG. Still not sure if I'll get into Voyager, but maybe I should if only to be a completionist after watching all the other classic series.