Massive - nasty growls and dirty wubs, and also short screeches
Serum - also dirty wobbles n such, but mostly for longer ones that have a lot of LFO movement and EQ filter automation
Sylenth- pads, Layered saws, and leads, such a beautiful vst
TAL UNO - analog subtractive synth, great for retro sounds with warmth to it
Learning FM8, absynth, and harmor right now, heard many great things!