Suzumiya Haruhi no Yuuutsu, Kanon (2006) Recommendations
kyon's prior gig as yuuishi in a very snowy town that is like an alternate universe to the melancholy of haruhi suzumiya....it seemed so eerily reminiscent. everything was very similar except kyon(yuuishi)...it was the exact same character.
Same main seiyuu, same production company, same art style.
Before Kyon was...well, Kyon, he had a debut in the remake of Kanon; The series has the same hilarious tone as The Melancholy, along with a fighting style much like Shakugan no Shana and some scenes so incredibly tragic or touching I cried. And I'm a guy. I really cried...It's a wonderful series. Also, the piano music in it is very professional and a step up from all other anime piano pieces I've heard before. Now one of my favorite series. You MUST watch it.
The protagonists are incredibly similar, although Yuuichi goes through a lot more sentimental moments.
The personalities of the main characters are very similar (in some cases being nearly identical), and the way they interact is also comparable. For example, Kawasumi Mai and Nagato Yuki. Just watch them and try to not see it.
What if Kyon was dropped into a real harem anime or what if Yuuichi was dropped into a supernatural slice of life anime? Honestly nothing would change because they're essentially the same character just different settings.
Both created by Kyoto Animation at relatively the same time, also the primary protagonist is practically identical to one another, same voice actor too. Both utilize impressive and ingenious takes on their pertaining genres. You will gradually become firmly and sentimentally connected to the characters as they develop.