Warm-up time.

In my experience it’s 20 minutes of actual playing time for a solid state amp.  So I throw on a CD, leave the room/go about my bidness and when I return the system is ready to pay some sweet sonic dividends.

Contrary to some of what has been said, tube electronics warm up relatively quickly.  CJ and AR both suggest about 30 minutes.  SS stuff can take hours.  The advice to leave SS stuff on all the time, especially if it is not Class A, makes a whole lot of sense.

Perhaps being on your second or third drink is making that "warm up" sound so sweet!

My rig is always on, except for my tubed phone stage and I still need music to run through it to get it going.

Both, solid and hallow state equipment are powered up 24/7 and usually becomes puresex after 60-90 minutes of playing music.