"The popular ones" could be just about anything, so I'm just going to put the ones I know that are pretty good, but I'll avoid the REALLY well known ones you've probably read (like Special A and Last Game). You might know some, so just ignore those. Honestly, I could give you a mile long list, but I figure that'd be annoying, lol.
Warau Kanoko-sama (he's a jerk at first, but he calms down real quick) and its sequel
Millennium Snow
Ludwig Kakumei
Ai wo Utau yori Ore ni Oborero! and its sequel
Get Love!!
Tonari no Kaibutsu-kun
Love So Life
Kiss to Koukai
Tomodachi no Hanashi (he's only a jerk to her when he doesn't like her; once he likes her he tries to be nice)
Taiyou no Ie
ReRe Hello
Hadi Girl
Saruyama
Arakure
Kiss yori mo Hayaku
With!
Zettai Heiwa Daisakusen
Reading**
I read most of the popular ones and I'm up to date with the ongoing ones. I'm here because I've already read most of the ones on the first shoujo popular page. Modern ones please. High school ones are preferable. I just finished reading Lemon Pop Soda and yeah I really love the popular boy help/notice the plain girl (just nothing where he's mean like Wolf Girl and Black Prince.) I've read a lot and can't seem to find some beyond the popular ones so I'm just hoping to see if the genre is more broader than I thought. Thank you (⌒▽⌒)