Throughout the Canadian Grand Prix weekend Hamilton was clearly not himself, reflected by the fact that not once post-qualifying or post -race did he raise a smile despite a job well done with Mercedes.
Throughout his interviews, both individual and mainstream, Hamilton provided clipped answers, making it apparent that not for the first time all was not well in his world.
After finishing third behind Red Bull's Sebastian Vettel and Fernando Alonso in his Ferrari, when Hamilton sat down to conduct his British media session, there was no doubting he was irked.
Hamilton's replies to the first three questions were: "I don't settle for anything but the best and wins; I still haven't got a win; Nico (Rosberg) has won a race, so I need to get a win."
When asked by Press Association Sport why his disappointment was so palpable, Hamilton said: "What I'm projecting is not disappointment.
"I've just got stuff on my mind."
The 28-year-old refused to expand on what was troubling him, but then almost as if a lightbulb had been turned on inside his head, Hamilton offered more expansive answers, perhaps appreciating he was not doing himself any favours with the way he was coming across.
Like night and day, he suddenly added: "It (the result) is positive in the sense the team is up to third in the constructors'. There are positives to take away from the weekend.
"So I'm happy I can get those points for the team because they are working so hard and we're doing a lot better than I ever expected when I joined. I definitely can't complain, but I want to win."
It was typical of the complex character Hamilton can be sometimes.
Back on message, and with the British Grand Prix up next, the fear is Silverstone's high-speed nature could prove difficult for him and the team given the problems encountered so far this year with tyre wear.
"I think we've made a small step in progress, but I don't think we've cured it," said Hamilton.
"Silverstone will be a real challenge for us, so fingers crossed it's not going to be a problem, but we'll have to see.
"Tyre degradation could be an issue. Long run (pace) is going to be a challenge because there are lots of high-speed corners.
"It's the perfect place to overheat your tyres and degrade them.
"But at these last two races our long-run pace has been fantastic. It was great in Monaco, and it was really good in Canada.
"We still weren't as quick as the Red Bulls and Ferraris, but it was really good for us.
"We still have to improve. I hope when we get to a high-speed track we are able to maintain what we had in Canada."
At the top of the interview the opening question had been about how he would likely settle for another podium finish at Silverstone given how the thousands of fans crowd underneath it and the noise generated.
It prompted the terse "I don't settle for anything but the best and wins" line, so when the question was revisited given his change in attitude, the response was altogether different.
"I want to give them (the fans) a good result, for sure," remarked Hamilton.
"Going to Silverstone is always a special one for me, and I want to win it, in my heart.
"I want to be as high up as I can possibly be. It's important to have a Brit on the podium.
"If I could take pole, that would be incredible. It would be like 2007 all over again, so that's what I'm going there to do.
"It's one of my happiest memories, and winning the race there in 2008 was unlike any other win or grand prix there that I've experienced."
There can be no doubting Hamilton's constant drive and desire to win, but which side of Hamilton will turn up at Silverstone remains to be seen.