Depends on the language, but when you have to use some metaprogramming gymnastics, then types are really hindering to develop something generically, if the lang

Depends on the language, but when you have to use some metaprogramming gymnastics, then types are really hindering to develop something generically, if the language doesn't provide a fully developed type systems, which few systems have. For example higher-kinded types are quite essential, but not always given. Then I prefer dynamic typing and get this done fast without safety. But then I remember getting a lot of bugs in certain types of applications, maybe one fifth, or something.