The phrase "ambitious side" is correct and usable in written English.
It can be used to refer to a person's aspirations, goals, or drive to achieve something significant.
Example: "Her ambitious side often pushed her to take on challenges that others would shy away from."
Alternatives: "driven aspect" or "aspirational nature".
It put his ambitious side on display.
I never saw David's hard, ambitious side.
— Jeff Gordinier The San Francisco Chronicle: "They have stepped form a curious and ambitious side note to something truly exciting".
The more ambitious side of StarGreetz involves orchestrating marketing campaigns for television channels, movie studios and other advertisers.
While the cooking here is on the ambitious side, many of the most successful dishes have a hearty simplicity.
Friends say he was motivated by a genuine and selfless desire to contribute, but also note a socially ambitious side.
Most of us can't afford them, but items like this certain stir our ambitious sides.
But Wolves, Blackburn and Bolton will be facing stiff competition from plenty of other ambitious sides, including last season's play-off runners-up Blackpool plus semi-finalists Birmingham and Cardiff.
Ronaldinho has agreed to join Antalyaspor and will link up with his former Barcelona team-mate Samuel Eto'o for the ambitious Turkish side, according to the club's president.
But here too there are more ambitious plans: side quests, further elements to the main story, and a world that has to remain consistent and coherent despite its random generation and the fact that players individually will only see a small portion of what's there.
In early 1983 Roy swapped Melchester Rovers for ambitious London side Walford Rovers after a fallout with the Melchester directors, but his stint away was short-lived and he was back at his spiritual home by the end of the year.
