All I can say is spend a LOT of time digging and diving into each specific synth until you know it inside and out. EVERY ONE of them is DIFFERENT, with it's own unique character and feel! I learned early on to use specific synths for specific sounds and tasks, and master them within those. I haven't heard an everything synth yet!
Thanks guys, it's good to know that I just need to hang out.
I definitly found some aspects of the filters, some are still a total mystery to me, also I guess there are some effects that I don't like or don't see the opportunity of use. Noise come directmly to my mind, I don't like distortion and... noise!
If you haven't done so already - go through presets and figure out what makes the patches you like tick. Thor is a good softsynth to explore because it has so many options. there's a ton of books, a ton of info online, a million youtube videos, etc... but I think i get the most out of just tweaking knobs or patching signals through various gizmos and listening to what happens.