UFC Fight Night 128...I remember it like it was yesterday!
Seriously though, UFC 72 with my girlfriend at the time. June 16 2007 in Belfast. Rich Franklin vs Yushin Okami was the main event, Forrest Griffin fought Hector Ramiez and Tyson Griffin fought Clay Guida.
Next live card I was at was UFC 93 where Dan Henderson fought Rich Franklin and Shogun fought Mark Coleman.