Midway through the 1980s, Sobczyk began to paint highly expressive figurative compositions that were rich in both color and texture. These were distinguishable for the fact that a plethora of themes, references, and symbols appeared in a single canvas. These included works that touched upon religious themes, Sobczyk often creating surprising juxtapositions of updated retellings and tradition (e.g. Biczowanie Chrystusa / The Flaying of Christ from 1988 shows the persecutor wearing the uniform of a concentration camp inmate). After 1989, Sobczyk's paintings remained figurative yet became somewhat decorative and ornamental in style. He proceeded to repaint some of his old paintings, giving them this new formal 'costume' (e.g. Boże Narodzenie / Christmas from 1987). In the 1990s, he created compositions based on a purposely limited set of motifs. These works betrayed the artist's interest for playing with meaning in their titles as well (Bóg skręca / God is Turning, 1992; Polonia Bolonia Dysleksja / Polonia Bologna Dyslexia, 2000). Between 1994 and 1998, Sobczyk worked with Jaroslaw Modzelewski in creating two new series of joint paintings that were ultimately shown at Warsaw's Centre for Contemporary Art at Ujazdowski Castle in 1998.
In addition to painting, the artist creates installations and three-dimensional pieces and writes theoretical and literary texts. 1997 saw the appearance of his book titled Uproszczenie sztuki / The Simplification of Art, published by the Galeria Zderzak / Bumper Gallery, which the artist has been working with since the 1980s. Sobczyk also does graphic design for the press and advertising, working in this realm since 1991 with Piotr Młodożeniec, with whom he jointly owns and runs a company called Zafryki. Between 1991 and 1996, Sobczyk and Jarosław Modzelewski jointly ran the private Szkola Sztuki / School of Art in Warsaw.
Simple Rainbow was created in 1991 for the exhibition entitled Epitaph and Seven Spaces, curated by Janusz Bogucki and Nina Smolarz. The rainbow stood on Małachowskiego Square until 1993. After 28 years, it has reappeared, functioning both, as a conversation starter and a method of retaking the square for its inhabitants.