Way too much stuff to respond to individually so I'll just make a few general opinions.

I can also get behind the idea that Yuakri gets too much hate from the fandom, she is kind of tied with Mitsuru as my favorite of the P3 girls, of anything, I think Aigis gets too much love. She's just a very complex character, and it's actually fun and rewarding to chip away her emotional armor and see the real her. One of the most heartbreaking moments for me in P3 was when you get far enough into her social link to date her, and in addition to being one of the most intimate and affectionate romance options, you get this scene (it might be the Christmas date) where she wants to see her mother and introduce you to her, and that scene is heartbreaking when you realize the game's ending. In fact, I've always been a bit thrown off by some of the romance options in the series because Yukari's is the only one where you seem to actually try to plan out a future, with which for me, is a big part of a relationship. Still, I kind of feel like more than anyone in the series, her relationship with the MC felt the most like a real relationship where you're trying to discover boundaries and work towards that intimacy. She's a very complex person and getting to know her is one of the more rewarding aspects of her story arc and SL.

While I do like the story that Junes brings to P4, it feels more like commentary on the nature of a large business coming to a town and basically consuming it's entire economy. My GF is from a small town and the one next over has a Wal-Mart and little else because of it. So it was a pretty cool element of Yosuke's story, though one that winds up being beyond the scope of the main story.

As for Inaba being more likable... I'm going to disagree once again. Another factor of why I don't care for the party having Social Links is because they make the setting feel smaller. It wasn't such a bad concept in P4 because the setting was meant to be a remote place, but when P3 copied it for the FeMC, I couldn't help but feel like the city was such a smaller place because the FeMC never expanded the world beyond the party. One of the factors I liked about the SL in P3 was that they made the setting of the city feel like a bigger place and made it more important to me that I wanted to protect it. Not just because the party lived there, but also several friends I had made across town, which is something I didn't really feel like I got in P4. I feel it's a better world-building tool to move the scope of your caring potential beyond just the people closes to you.

Being the cynical ass that I am, I can't rely on first impressions of people to judge whether I like them or not because I would have very few friends if that were the case. Oddly I'm more leery of people who are overly friendly with me than standoffish ones surprisingly enough, because I can at least understand where those types might be coming from. This may largely play into why I prefer P3's cast over P4s because the party dynamics work better with my relationship philosophy whereas the overly idealistic nature of the P4 cast never felt right to me. In some ways I almost feel like P4's cast is a result of fan feedback whining about the P3 cast being too moody and hostile towards each other, and then P5's party was based on fan feedback that the P4 cast was way too friendly. Personally I feel P5 hit a nice balance of the group being pretty cozy with each other but still maintaining a sense of professionalism due to only banding together because of a common goal. Granted, there are still some hiccups here and there with them but that's what P6 will be for.

As harsh as I may be sounding with P4, it's not like I hate it or anything. Comparing the Persona game casts for me is like comparing desserts: P3 is a strawberry shortcake, P5 is apple pie with ice cream, and P4 are chocolate chip cookies with macadamia nuts. I like all three, especially when compared to other choices, but when put in order of fave to least, cookies are not my top choice compared to the other two and the Pumpkin Pie that is P2. At worst, I simply feel indifferent to P4 in some ways. I don't hate Yosuke, but he wasn't even my favorite character in P4, whereas Junpei is. Ryuji himself is also towards the bottom of the P5 cast for me, but I also found him to be more memorable even if some of his memorable traits are not exactly flattering, and that's something that's required for a character to be likable for me. Yosuke simply never stood out to me and it didn't take long for me to relegate him to 'token best friend" and simply ignored him while I focused on the characters I did find interesting. I mean Kanji stands out because his story is interesting. Again, I would point out that Yosuke's SL was very forgettable for me largely cause it didn't have any real memorable arc to it. It felt more like hanging out with a needy friend than actually a story. This is why Kanji is more well liked, because his story was actually memorable and his SL had a clear focus that built to a pretty satisfying conclusion. To be fair to Yosuke, he's not the only character I felt had a weak SL, I feel Chie's was also very underwhelming as well as Fuuka, and Ann's took forever to actually get interesting. The one thing I liked about P5's SLs was that all of them had an actual focus to them.