Amazing/great tierlist:
Password - one of their best Japanese tracks ever (quite possibly overall) love the alternative/electronic type of rock feel to it and how it mixes with pop elements, reminds me a bit of Linkin Park for some reason but without the rock vocals and I love LP. The melodies and sounds it creates makes it mysterious and almost haunting, especially the bridge part with Jjong ethereal vocals. Aside from just hitting the spot for me, it's objectively a really interesting/unique song, I don't think there's many songs like that at all in Kpop, on the experimental side
10/10
The World Where You Exist (Kimi Ga Iru Sekai) - this is again one of my favorite Japanese ballads (candidate for THE favorite) it's just so pretty, the melodies, the vocals, ughh hits me in the feels especially when I can understand the language, everything is just perfect
10/10
Hitchhiking - this is also even better live, I especially love the live band version in Japan where you can hear the electric guitar more clear and it just slaps, and that club remix version is a banger too, but this is audio only and it's still amazing, love the scratchy instrumental and the drive
9.5/10
Forever or Never - this I hadn't heard only until like last year idk why but I loved it since first listen, it's hard hitting, somewhat on the darker side, catchy, amazing vocals esp from Jjong again, it would probably be getting my vote in a weaker group
9/10
Diamond Sky - this breaks my heart that I won't be voting for it because sometime ago I decided that it's my favorite Japanese bside track but it might be because of the sentimental feelings (I've seen/heard it live at the From Now On concert :') ) and it's much better that way, sadly the audio has just a bit too much of vocal processing and some sorta weird effects for me, but still a great song
9/10
Quasimodo - entering the great territory, this song grew a lot on me over time, I think it's also somewhat better live but I still do enjoy the audio, the best part is hand downs the last choruses and outro, Jonghyun's high notes as per usual giving me shivers
9/10
Good tierlist:
Become Undone - this is super close to a great tier, in fact it might be I just needed more songs for the good one it's a very strong round

I love emotional SHINee songs with powerful/dramatic singing and this is one of them, also like the xylophone instrumental 8.5/10
Kiss Kiss - one of the better tracks on DCM for me, great vocals, the kissing sound surprisingly doesn't make it cringy and gives it a nice thematic addition 8.5/10
Start - at first I thought I'd put it in the ok tierlist but the verses and some other parts helped it go up, I really liked them and the nostalgic feel the melody creates, still the choruses don't let me give it more than
7/10
Ok tierlist:
Do Me Right - you say what?

aside from a questionable title it's not too bad, there's some catchy parts
6/10
Attention - it's ok and pretty groovy, but nothing amazing, one of my least favorite songs of DCM
6/10
Senorita - I used to skip this song but now I liked it more mainly because of the vocals, still not amazing overall
5.5/10
Meh/boring tierlist:
Romance - this is close to an OK, it's pretty fun but the lenghty outro makes it too long for me and leans towards boring
4.5/10
Orgel - it's definitely an interesting song and sound but I just don't feel it personally
4/10
So after an inner battle I'm going to vote Password, The World Where You Exist and Hitchhiking, but many of these other songs are also really really great please consider voting for them