The very short simple version –
To win
To watch someone else lose
To have sex
The slightly more detailed version
To build, fix, or break something
To blow something up
To watch something blowing up (on TV, in movies)
To simulate something blowing up (I.E. video games)
To watch something go really, really fast
To watch something go really, really fast – then explode
Buy a shiny new toy
Buy a better shiny new toy
Drink a beer/alcohol
Drink a beer/alcohol with friends
See female nudity or scantily dressed females
Compete with other males
Watch other males compete against each other
(Ideally – get into a fight while watching other males compete while being cheered on by nude/scantly dressed females – even better if you can fit some explosions in there)
Catch and/or kill some form of less intelligent living creature
Gather useless information
Gather more useless information than anyone else
Be left alone
To get laid
