If you're referring to that overused, beaten to death Autoune "chirp" that's been used by every R&B artists for the last 10 years...and that was originally first used by Cher on her "Believe" song...
...no, it is not a "now sound"...and people need to simply STOP using it as a vocal effect.
It's done...over...just STOP.
AFA using autotune for actual pitch correction (without the "chirp" effect)...hey, do what you have to. Even the best vocalists need some help, and are not able to always hit everything perfectly. You just don't want to depend on autotune as a way making you sound better as a singer.
To the OP...
The vocals in the first song (left to right) are reaching way to far. Basically there are just too many words to phrase comfortably within that rhythm.
Your vocal timing is off throughout...and you are struggling to keep up.
Also...the melody is almost monotone throughout...I don't think there are more than 3 notes in the entire vocal melody.
You can do better than that.
The other two songs are a bit better, and show slightly more developed melodies, but I thihnk you can do better to lose the monotone sound,...also our phrasing is more in sync with the song rhythm. I think you just need a bit more work...but in the last song, your vocals sound the most improved...but just STOP with the autotune "chirp" FX...
...it really is old news.
Don't depend on that to give your vocals some kind of catchy "ear candy"...because it just makes you sound like you're late to the party.
Just go for natural singing without any FX...that's what works best 100% of the time.