I'm going to make this article because I want to express myself about what I think about each member. Hope you'll enjoy it!

Vocal ranking:

1-Taeyeon
Of course Taeyeon, who else in SNSD can challege her? She hits and mainteins her high notes easilly. She has a open vocal range and she's very versatile.

2-Jessica
She's really good but I haven't seen improvement in a long time. That makes me think that she can't improve more, or that she don't want to. Her high notes are amazing and I love her voice, which never change in performance.

3-Tiffany
She's been shadowed for 5 years and now people complain...

Even though Hyo isn't my bias, i feel like the japanese producers treat her even worse than the korean producers, when it comes to lines

I know Hyoyeon might not be the best singer, but she sure improved. i even think she's better than Yuri and Yoona now, especially on live performances. she's also way more capable than what we hear from her lately.
because when i compare her latest lines with her oldest ones....GOOD LORD. she used to do so much more with her voice back then.

Another thing besides the lack of Hyoyeon is the thousands and thousands of lines that Tiffany has in this song
and oh,...