So I just watched Expendables 3. It was pretty enjoyable, but like the two previous installments, it's a shame that they aren't more funny or entertaining than they are. You have a great cast and a lot of room for fun things to happen, but with the exception of a few scenes, it's too serious. In a small contrast I watched Commando again last night, and it still holds up as a really fun action movie, and a much better movie than any of the Expendables movies IMO.
I think my main problem might come from Sylvester Stallone being the leader though. I like him in specific roles, like Rambo, Rocky or Cliffhanger where he is more on his own, but being a leader for this gang, I don't know. I would have preferred someone like Arnold being the leader, because he has that charm and charisma. But considering Stallone got this baby going, of course he's going to be the lead. The dream would have been a movie like Predator but with all A-listers. Drop them in the jungle, have them go out on a crazy mission with lots of funny lines. It's not fun or entertaining just seeing them shoot down 500 henchmen. At least in the old Arnie movies he had some amazing one-liners while disposing people.
As an action movie, I'd give Expendables 3 like a 7 out of 10, similar to how I would rate the previous two. It's enjoyable, but it could have been funnier.