My shoulders have been one of my best body parts for years. From my early 20's to about 28 years old I incorporated raises in the front to isolate my front delts. What I noticed is that my shoulders got very out of proportioned as compared to my rear delts. So, I stopped doing them cold turkey. Now, I concentrate mostly on bent over lateral raises. If you do a lot of dumbell presses like I do, you really hit your front delts sufficiently. Of course genetics play a role in this but my point is that your shoulders are very intricate and once out of balance dont look aesthetically correct. Learn from me and make sure to really work your rears bros. Few things look more impressive than seeing boulders from the side rather than the front!!!! LOL