I've been a fan of Milkdrop since the early days, but I started to be really impressed when artists like shifter, EOS, yin started coming out. After that flexi impressed me with his detailed fractal presets...and now that Milkdrop 2.0 is out lots of amazing features that kick up the amazing displays.
Thanks to all the artists that contributed your talents. It makes music look great especially ambient music. MD 2.0 seems to have better beat detection which the preset responds better to volume swells and beats.