Watching KyuSung compilations on YouTube. It strikes me time & time again how Kyuhyun is such a Jerry but of all the members who love Yesung, I personally think Kyuhyun is #1 (yes, even more than Ryeowook). A thread on my analysis on this (events not in order, am just listing)

1. When Yesung was host at Muzit and KRY visited him during his bday week, it was Kyuhyun who changed the lyrics to the birthday song.

2. When Yesung fell down during the Mr Simple perf at Friends of Korea, he was the one who was visibly worried (along with Shindong)

3. Kyuhyun surprised Yesung at his solo concert and did Your Eyes duet

4. Kyuhyun indulging Yesung by singing duet At The Time on Yesung's solo album; to-date he's the only one who has 2 duets with Yesung

5. Kyuhyun has appeared in Yesung's Pink Magic MV (with Donghae) and also a concert VCR or smth of that sort (where he played a customer who took pics in a cafe)

6. He was the first to cover Yesung's It Has To Be You

7. He organized the Gray Paper performance in SS5 after Yesung enlisted

8. Almost always the first to wish Yesung Happy Birthday

9. He's always saying Yesung is an 'interesting' hyung, lol. I find it sweet he finds Yesung's antics very amusing and will put up with them no matter how lame

10. Kyuhyun acts as if he doesn't like skinship but the compilation shows he's just as clingy to Yesung as Ryeowook is, lol

11. The awe and respect he has for Yesung; always watching intently when Yesung sings. Also him telling Kim Gura Yesung's like a mountain & on Radio Star, Kim Gura introduced Yesung as the person Kyu's envious of

12. Kyuhyun wanting to spend time with Yesung in Japan, as he brought up in the Naver Starcast. Of all the things he could possibly roast Yesung for (which is why members start overreacting when he chose Yesung), he opted to bring that issue up

Ok, I'm gonna stop here cuz my brain's fried & got things to do. Conclusion is, Kyuhyun may not be vocally appreciative or loving towards Yesung like Ryeowook is (although he seems to have no problem fanboying over Donghae, lol) but his actions seriously speak a thousand words