Carbombs are tasty (much to my surprise, had a pretty bartender talk me into trying one... my Irish friend sitting next to me looked like I had just strangled a kitten) but they are a waste of good booze.
Kamikazes are a quick tasty buzz, but haven't done them lately... actually haven't done shots lately. If I am going to drink straight booze I go with premium stuff and sip it out of a tumbler... anything worth doing is worth doing right damit!
For knockout shots 110 proof Rumpleminze (sp) out of the freezer... four shots and its beddy time... REALLY bad hangover material though.