All he needed was that feeling and he'd be ready to make his decision.
On Tuesday evening, that gut feeling came and Plattenburg, who spent the previous two years in Southern California at Corona (Calif.) Centennial, decided he wanted to return back to the Southland to play his college ball.
Plattenburg committed to UCLA, giving the Bruins their second four-star cornerback.
"I was just waiting on the gut feeling really," said Plattenburg. "Seeing how everything laid out, I saw a good opportunity at UCLA. I love the coaching staff. UCLA is really another home for me. I had been going back and forth after my visit to Wisconsin and Oregon, and I just thought about life after football."
Plattenburg called defensive backs coach Demetrice Martin with the news. "Of course Coach Meat was jacked," said Plattenburg. "You know Coach Meat, he was all hyped. I'm going to call Coach (Jim) Mora too here in a bit."
Plattenburg said the opportunity to go back to Southern California was too good to pass up. "Southern California is my second home. I have family out there and it will be a good thing for people around me to be able to see me play and be able to support me," said Plattenburg.
Plattenburg took a number of unofficial visits to UCLA when he still lived in the Southland, but hasn't taken an official just yet. That will likely come at the conclusion of his season.
"I don't have the date just yet," said Plattenburg. "We're just going to see how the dates work and plan it."
Plattenburg said he's already working on his former Centennial teammate and UCLA target Tre Watson, a commit to Cal.
"I just got off the phone with Tre not long ago and I'm trying to get him to go to UCLA too," said Plattenburg. "It will be going to go into something not alone. And I want to help build a program and get to the championship and be around players with the same love for the game."
Plattenburg said UCLA commit Adarius Pickett, the Bruins' other four-star cornerback, and him talked about playing together too, having gotten familiar with each other at the Oakland NFTC and The Opening.
"It will be real cool playing with Pickett," said Plattenburg.
Another former teammate, Viane Talamaivao, who committed to USC on Monday, and Su'a Cravens, the USC freshman who played for the same 7on7 team, already are starting the rivalry talk with Plattenburg.
"Already I've got it going with Su'a," said Plattenburg. "That's my boy. And I'm getting it going with Viane."
Plattenburg said he's happy to be done with the process.
"It's a big relief," said Plattenburg. "I've been thinking so hard about it. Even today. So now I can be more focused in on my season. It's just a big relief."
Plattenburg and Lamar will take on Alief (Texas) Taylor this Saturday in the playoffs.