Thanks for sharing. Studying Russian has helped me notice interesting patterns in languages. Where there is much friction (due to heavy usage, difficult pronunciation, or both) languages tend to break rules to make things easier to say.
For example, it's trivial to conjugate a verb like "контролировать" that you might only use occasionally, but verbs that you say dozens or hundreds of times a day, like "идти" become increasingly irregular.
Irregular verbs generally tend to be the ones that are used most often, and that are most archaic.
Looking at languages there are lost of interesting patterns you can notice. It's even more fun if you look at ones from an entirely different family. Some agglutinating languages may have no irregular verbs at all.
For example, it's trivial to conjugate a verb like "контролировать" that you might only use occasionally, but verbs that you say dozens or hundreds of times a day, like "идти" become increasingly irregular.