I've seen this debate many times on forums such as YouTube, Facebook, Reddit and many other places. Some argue analog is the best. Others say digital sounds as good but with more options. Next you have the ease of use conversation. For example, a lot of people dislike the Korg Microkorg because of its workflow. A lot of options with few knobs to control them. Same with the Waldolf Blofeld and the menu diving. A knob per function on a synth such as the Arp Odyssey & Korg Minilouge is wonderful to program. Some say the Moog One is the greatest synth ever made. Yes, that keyboard is loaded with features but, none of that matters if you don't know how to use it. So to answer the question of what is the best synthesizer. The synthesizer you know how to you use the most! When you really know A synthesizer. You can get sounds out of it that an average user can not. Even if a synthesizer lacks features, with great knowledge you can figure out work arounds to achieve the same or better results as one with more capabilities. Close enough to use and still enjoy. Take the time to master the synthesizer you already own.