I actually kinda liked the art. It was dated, for sure, but it had a certain charm for me. Glad you didn't let it keep you from reading it though, it's really awesome. I'd say HF was my favorite, but I really didn't like how it ended. And while Sakura may be my favorite heroine, I considered the romance between Rin and Shirou to be the best in UBW. UBW had a more ideal story going for it, but I preferred HF because the epic scenes were far more enticing.