Vaessen's unique playing style has caught the attention of many, including the keepers of Ajax and PSV. He often chooses to play the ball in a way that other goalkeepers might not, which has earned him a reputation as a skilled and confident player. VoetbalPrimeur reports that Vaessen has been training with a keeper trainer since his time at RKC, which has helped him develop his skills and make quicker decisions during games.

Vaessen's ability to read the game and make accurate passes has been a key factor in his success. He has been working on his passing skills for years and has become comfortable playing with his feet. According to Vaessen, he has been training extensively to develop his skills and has become more confident in his ability to play the ball. As a result, he has been able to make a significant impact on the game and has become a valuable asset to FC Groningen.

Vaessen's next challenge will be to continue to develop his skills and adapt to the changing tactics of his opponents. He has already shown that he is able to vary his playing style and make adjustments during games, which will be crucial in his continued success.