Idk, I had my way, the only shipping with शिकामारू would have me in it *people stare* meh. I guess people like Shikatema cuz of the chunin exams and the mission take back Sasuke. But I say, that if नारूटो killed Sasuke durring that mission, शिकामारू would have been comforting Ino all दिन and forget Temari saving him. ..... and i am off subject again
Because people think they have the interaction. I mean, Shikamaru's chauvinistic, lazy, clever, and believes that men can fight their own battles when this girl, who's badass, a feminist, and everything that शिकामारू hates blasts into his life and *gasp* saves him. They have a love-hate relationship that people like.
Also, the whole "She's-scarier-than-my-mom" thing is something that's fueled ShikaTema fans. And the fact that Temari shows her softer side around Nara.