Compared to other major sporting championships, it's quite hard for Formula 1 drivers to express themselves during competition. For safety reasons, they're understandably cocooned in carbonfibre and their machines cover a lot of the work they do to dance the cars onwards at high-speed. Whereas football or rugby players can celebrate a magic moment with their team-mates in real-time, a driver is alone until the end.
The team radio helps - and it has provided wonderful insight since it became ingrained in F1's TV coverage in recent decades. Some drivers, with Fernando Alonso the classic example, have become masters at exploiting this way of expression (although Alonso insists this is a "private conversation" between drivers and their engineers).
Expression is always there in the post-race moments - and there have been some glorious instances in F1's history. From Ayrton Senna climbing aboard Nigel Mansell's Williams at Silverstone in 1991, to Alonso stepping out of his car on the 2012 European Grand Prix in-lap and celebrating in front of his adoring public in Valencia, to the glaring hat-throwing between Nico Rosberg and Lewis Hamilton at Austin in 2015. In that last example, so much expression was quickly sewn into the pieces of fabric the Mercedes drivers chucked around, as well as etched on their faces.