Hana Yori Dango
This is the story which introduced me to the manga world. I probably re-read most of the chapters more than once. I thought that at some times, the plot was stuck in a loop endlessly repeating itself but I loved every part of it down to the last page. I wanted a spectacular ending and Rui to be happy (with Shizuka) but still this is a cult manga for me (perhaps it is one-of-a-kind manga because I doubt that there is or will be anything which is even remotely similar to it).
Anata O Wasuretai
The romance in this one shot was "so-so", the shift in the male character's feelings was crude (illogical maybe). I have never been able to understand his logic behind bashing Terry, even if he were afraid of admitting he loved her but the things he told her were simply insensitive and cruel. This angle hasn't been addressed well in the manga. Isn't forgiving an insensitive playboy the same as projecting the image of a woman who lacks self-esteem? Of course I loved Terry but J.B. is a different matter. He is really uncool to say the least (jerk is the word that I had in mind).
Tail of the Moon
This is a pure entertainment manga with a heart-warming romance. I had a lot of fun reading it. If you're looking for something "kawai" and pleasant to read, you should definitely go for this one. Some elements might be considered as overbearing though, especially in regard to how the "reverse harem" was introduced but this couldn't be helped as this is one of the tropes characterizing the shoujo universe. Everyone had a happy ending except for the bad guys on whom the mangaka bestowed a redeeming act to salvage their image. If you have read/watched Ranma 1/2, it is guaranteed that you'll love this one as well.
Chupa!
An original plotline with a comic tone. It was very fun and pleasant to read.
Mud