OK, so I'm 37 and I've never seen a Rambo film until now. Does that make me a bad movie nerd? I've seen Son of Rambow which is brilliant, but I don't think that really counts. The whole premise of First Blood, that a Vietnam vet is treated badly by the Sheriff's Office of some small town so he runs into the woods and takes revenge, is fairly ridiculous; but it is a testament to the direction by Ted Kotcheff that the film is so much fun. It's all a bit A-Team as I don't remember many people dying despite all the explosions and violence, but it doesn't suffer because of it.
Probably one of the reasons I've never made an effort to see a Rambo film is that I've never been a fan of Stallone. If I'm honest, I've always preferred Arnie; he seems to feature in more films I'm interested in (I hate boxing, so Rocky is wasted on me), and even if Schwarzenegger isn't a great actor, at least I can understand him when he speaks!
Having said all that, Stallone was perfectly watchable as John Rambo; and though he isn't the most eloquent, the fact that I really routed for his character helped a lot. It does feel like the first part in a series, and I've no idea whether First Blood Part II was already planned, but as First Blood works great as a stand alone film, it really doesn't matter.
The only other main player of any real note is Brian Dennehy, who is great as Sheriff Will Teasle, the guy who arrests John for being a bum; even when he realises he's bitten off more than he can chew he belligerently goes after Rambo. All the other cops are fairly incidental; Richard Crenna plays Rambo's previous senior officer when in 'nam, but really only turns up at the end as more of a link to the next film
First Blood doesn't do anything particularly special, other than cement Stallone as a bona fide action star and convince me that he isn't all that bad. Well paced, and some brutal action, First Blood is very enjoyable. But, well, you know, that’s just, like, er, my opinion, man.