Okay, this is all me, and I don't want to start an argument or have other people get the wrong idea:
I think Sasuke is strong. He is powerful, smart, has a wide variety of jutsus, and can stand on his own against alot of shinobi--but this is not why I disslike him. I'd stand Naruto above Sasuke any day (the entire picture, definately not just power) mainly because of Naruto's character, morals, goals, opinions, means, etc. On top of that, one of the things I like the most about Naruto in a fight is that he's clever.
What Sasuke does, as done, plans to do, etc just puts me at the point where I wouldn't even sneeze in his direction. Not to mention the means as to how he got most of his more powerful jutsus. Don't get me wrong, Sasuke has done a number of things himself. He alterd the chidori to form a blade, ran it around his body, throughout his body, learned summons, awakened the first three stages of the Sharingan, and created a vast array of fire and lightning jutsus.
Naruto, however, got 95% of everything he has the hard way. True, the Fox was sealed in him, but until he claimed the Kyuubi's chakra for himself, it was really more of a hinderance than a blessing. Learning the Rasengan in two weeks when it took Minato and Jyraiya two years. He learned Sage Mode in a few weeks and perfected it when it took Jyraiya most of his youth to learn and it was incomplete. Defeating the Kyuubi (yes, he had help, I know) and claiming its chakra.
I'm not a Sasuke "hater," per se, and I'm not a Naruto fan boy; I just like Naruto MUCH much more than Sasuke. As far as character, Sasuke's a brainwashed twat.