Speaking from purely personal experience, which isn't the most extensive (half a dozen grows), my favorite is most certianly General Hydroponics Floranova series. I'm sure there are people that prefer the Lucas Formula over it, and maybe it's better I have no idea. In terms of simplicity and an 'all in one' nutrient line, you really cannot beat it. Because I run in standalone DWC buckets, the fact that this stuff is the texture of gritty motor oil doesn't really have a negative affect. I've used AN two part PH Perfect Sensi nutrient line, and my problems were countless...believe me...that stuff is NOT PH perfect, not for me anyways. The GH Floranova is not only easier (1 bottle for Grow, 1 for Bloom), but the PH was far more stable than the PH Perfect Sensi from AN (ironic eh) as well as the overall health of the plants. I also found the need for less if any additives with the GH Floranova. Hope this could help some bud.
Happy Growing!