User blog comment:TenCents/Why/@comment-2246006-20110107022603

Because Seddie has such an amazing chemistry and spark that Creddie could never hope to live up to (this is just my honest opinion; I don't mean to insult any Creddie shippers). Sam and Freddie just compliment each other in ways Carly and Freddie never could.

Sam is a bully and a delinquent; Freddie is a technical genius and an all-around well-behaved young man. Sam is aggressive and sometimes very mean; Freddie, at least in comparison, is rather gentle, and is a very nice person. Sam is spontaneous, loud, and rather obnoxious; Freddie is quieter and much more logical.

They're such opposites, but whenever they come together, they compliment each other. At the beginning of the series, Sam was much worse than she is now. She beat up people regularly, often for no good reason, and also played cruel pranks on them. Now, in Season 4, she's mellowed quite out a bit and has instead resorted to playful teasing and, for the most part, harmless pranks.

Likewise, Freddie is much different now than he was at the start. In the beginning, Freddie was whinny, annoying, and very much so a pushover. But now he's "manned-up." He fights back on the rare occasions Sam decides to pick a fight with him; instead of simply laying there and taking the abuse people fire at him, he responds back with banter just as witty or as cutting; and he's even began to get a bit more aggressive and sarcastic.

Sam and Freddie change each other. They don't do it for their own personal gain or benefit; in fact, they don't even to seem to realize that they do it. Without even realizing, they make each other stronger and better people, and for me, that's a pretty darn good reason for them to be together.