Logically it has to take your current enthusiasm level in to account. Otherwise there would be no reason not to CT evey single game.
Not really.
CT could either rise as a function of enthusiasm, or rise by a fixed level.
Neither of those cases would justify CTing every game.
NO ONE at this table ordered a rum & Coke 
 Charles: Penn has some good people 
 A CT? Really? 
 Any two will do 
 Any three for me 
 Any four will score 
 Any five are live