the right training partner can be more beneficial than any steroid or supplement out their....that being said the wrong training partner will ruin your workouts...while lifting my partner and i dont talk other than to motivate each other for a lift or ask how much weight....if you have a guy spending the whole workout talking to girls not spotting you etc...etc...it will just piss you off and ruin your workout....make sure anyone you use has the same goals as you
I agree in how the proper training partner is an incredible source of motivation and inspiration. I train in the CrossFit program, where we train our workouts in group environments, and the camaraderie you draw by training with others is awe-inspiring... I love it. After years of training on my own, being the guy with the eyebuds on, hat pulled down, never speaking to anyone, I'm all for training with others.
As he pointed out though, you need to find someone with the same goals. If you find that individual, camaraderie through misery is one of the best things you'll come across in life. The bonds made in boot camp are of similiar nature. I know that sounds a bit like a stretch, but you'll see what I mean if you find yourself with the correct partner(s) and environment.