Yes, there is a fine line between following the fly with your rod tip, and having enough angle to have the rod absorb the shock. I break off more during the fight than on the initial hit.and more likely to be pointing the rod right at the fish. I really like 6lb fluoro for that, but will use 3x, 4x, 4 or 6 lb Max as well.
In the winter/spring I like enough tippet to get the fish out of the heavy water, and this time of year I want to get them in without having to tire them too much, the water is getting warmer. A plus, 3x is MUCH less prone to leader wrap or tangles when fishing multiple flies than 4x or finer.