This is not exclusive to Airguns since trends of Airguns are highly influenced by what type of Real Steel Pistols are popular to people. This is often based on what people see portrayed in movies and TV Series, and also promoted online. There is for sure an overlap in what is popular and it is hard to say what is influencing what? Is it the popularity of Pistols out in the real world that influences what we see being used in the movies and on TV? Or is it what we see in Movies and TV that influences our choices of pistols out in the real world? Perhaps it is a combination of both?
My list is based on my own personal experience and does not represent the entirety of types of Pistol designs available.
Glock
Sig Sauer
1911
Beretta 92 / 84
S&W M&P
Makarov / Walther PPK
357 / 44 Magnum / Colt Single Action Army
Desert Eagle
UZI