Mousou Telepathy
First of all, 700+ chapters means 700+ pages in reality, because each "chapter" is in fact only one page. Secondly, it's a Yonkoma (4 panels manga), so you can pretty much skip a lot of pages if you wish without much impact. But once you start, you probably won't, because the content is so funny. I usually don't like yonkomas. But I read all the pages here and really liked it. It's still a 4 panels manga, so the story isn't very fluid and the aspect of slapstick is pretty prominent. But the story telling is great and the characters so adorkable that it's a great pleasure to follow their development.
Kusumi-kun, Kuuki Yometemasu ka?
Hilarious but for the most part simply annoying due to the characters and their stupid antics repeated over and over. Erika's tsundere act and Kuzumi's cold fish stance might be cute for a while, but it's just unbearable if it repeats for like 80% of the story. My advice: Just read the first five and the last ten or so chapters to keep your sanity.
Yandere Kanojo
Typical four panel slapstick with a lot of funny moments but not really a consistent story. The artwork is very plain and below average.
Suki x Suki
I'm not very fond of tsundere characters and the FL is hardcore tsundere. Coupled with a for panel format this means that there's not a lot of story but a lot of rather annoying silliness over and over again. Not my cup of tea.
Lucky Star