If you don't appreciate The Motion Picture as a movie screen sized hours long version of a TV episode and opportunity for the first real beauty shots of the Enterprise, then you are no real Trekkie. :P

Maybe it's because I went to see it when it came out as a kid and it following the success of Star Wars simply blew me away. Best opening and intro of a retcon ever (the Klingons of course). Of course I like Wrath of Khan more, but I will defend the first movie every time as a masterpiece too.