Words to Describe improvising

How improvising often is described ("________ improvising")

• desperate
• comfortable
• such
• cool
• melodic
• longer
• brilliant
• much
• sound
• rhythm
• modal
• more
• spontaneous
• little
• half
• based
• constant
• clever
• best
• own
• free
• considerable
• creative
• perpetual
• collective
• good
• musical
• busy