I suspect that I'm not alone in having felt the exact same way. This repetition perfectly frames what seems to be a saga of the life in a day of just a typical guy and his family and friends, fights and fun, loves and loathing. What comes in between is pure, propellant power guaranteed to speed the listener to ecstasy. The last two songs simply bulldoze you over without allowing you to catch your breath. There are a lot of neat guitar noodlings and vocal harmonies.
Pain never rests on their predecessors, however.
Bet you can't listen to just one. Pain is really hard to pin down, save for the fact that they have lots of energy and are really tight. The closest band that I can think of is Miami's I Don't Know, who also blend styles and switch gears with ease. Lyrics are a bit on the silly side. The band's process of musical maturing seems to be heading in a great direction.