Just discovered them a few years ago, which is sad because I've been around for a while. I used to be a huge Iron Maiden fan and it's very clear to me that much of their sound was inspired by Thin Lizzy.
These guys never get enough respect, and are known primarily for one song--Boys are Back in Town, which isn't necessarily representative of their style and song.
Running Back, Romeo and the Lonely Girl, Cowboy song. Jailbreak is just a great record. I also love Fighting, Bad Reputation, Johnny the Fox, Black Rose, and the live album which has an AMAZING version of Dancin' in the Moonlight.
Phil Lynott just has one of the all-time great rock voices. It's a crime that these guys aren't in the R&R Hall of Fame.