Trainspotting is one of my favorite movies. It's well-shot, well-acted, and damn gripping. If you ever needed an excuse not to do heroin, I'd say this movie would do the trick.
One of my favorite moments is Renton's (Ewan McGregor, before he became a George Lucas shill) overdose. As he sinks into the floor, the carpet he's lying on follows him down, and Lou Reed's "Perfect Day" kicks on. Genius.
Anyway - a memorable quote:
RENTON: The downside of coming off junk was I knew I would need to mix with my friends again in a state of full consciousness. It was awful. They reminded me so much of myself, I could hardly bear to look at them.-30-