Randomness is sometimes underrated by people in just coming into the world of synthesis, but it is extremely important to make stuff interesting it really adds a little spice to synthesis...
Sapel is a dual tamed random source from Frap Tools.
More info at Frap Tools
With Ventris Dual Reverb, Arturia Keystep and Lab4Music Sipario
We hook up a bunch of synths - now where's my cape?