Baldur's gate 2 (Never actually played the 1st one, but anyway: Melf's minute meteors, best spell ever, especially if you had half your party bombarding a pit fiend with them)
Morrowind (The first game where I experimented with mods: Dwemer glider + Scroll of icarian flight... I ended up getting from Seyda Neen to the top right corner of the map, where there was an island from another mod, in one jump)
Team fortress 2 ("You are...Stupid! Would you like a second opinion? You are also ugly!")
D...oh wait, it says don't say FL.
And finally, Empire total war (Listening to people shouting "Huzzah" in funny accents after a victory never gets old)