I am a fan of the 7.62 round, but wont tear up anyone who uses the 223. My thing is, I just hope no matter what round a person chooses, they are proficient with that particular weapon. A guy with a bolt action 22 magnum and knows how to shoot it will be a better asset than a guy with an AR-15, 30 round magazine who doesnt have a clue what hes doing and wastes all of his ammo with a "spray and pray" technique.
For me, I like an SKS over an AK or AR. Probably because it was one of the very first high powered rifles I ever owned and I can tear it down and re assemble one blind folded. With the whole after market stuff available for all of the guns, getting one set up the way you like, is relatively easy/affordable. At the moment I am considering getting a bullpup stock for the SKS.