I like the feeling of switching magazines. It's got a nice finality to it.
Empty magazine on enemy, reload as he falls dead.
Snipe several sentries, reload and move on.
Empty your magazine on a boss, take cover and reload before opening fire on them.
I think having to reload improves the flow of the game. It adds a small change that slightly breaks up the monotony of shooting stuff. And can open up a few tactics (run up to enemy as he reloads, shotgun him in face).
Empty magazine on enemy, reload as he falls dead.
Snipe several sentries, reload and move on.
Empty your magazine on a boss, take cover and reload before opening fire on them.
I think having to reload improves the flow of the game. It adds a small change that slightly breaks up the monotony of shooting stuff. And can open up a few tactics (run up to enemy as he reloads, shotgun him in face).