My favorite has always been Delta Force 2(1991):
Ramon Cota is such a great bad guy, right up there with Tong Po and Chong Li for GOAT Cannon Films villains.
Second place is definitely Sidekicks, that movie struck a chord with me when I was a kid with asthma that loved martial arts movies. I rewatched that fairly recently and it's pretty great, the fight with Joe Piscapo is hilarious.
Behind those 2 I'd put Hero and the Terror and then Missing in Action 2. Invasion USA is gonzo violence but really has no story, epic Cannon Films movie though. I remember really liking Firewalker when I was a kid but I haven't seen that since I was probably 7 or 8. Hellbound is an underrated Chuck Norris movie also.
Code of Silence is also very solid, not one of my favorites but one of Chuck's better movies.
Can't say I really liked the original Delta Force or Missing In Action that much, solid for their time but neither has aged very well. I haven't really seen much of his 70's movies, I need to check out Lone Wolf McQuade, I have that and Breaker Breaker on DVD but haven't watched them yet, I'm on this kick now where I'm collecting all of the Chuck Norris movies, also Walker Texas Ranger is pretty fabulous.