For one thing, I have noticed that more people are using 'I' in their speech a lot of the time, even the lecturers. However, I have not lived long enough to observe any changes. Are people using 'I' more often then in the past. It certainly is the case that 'I' is used more ofen in songs which obviously will feed into daily speech. However, it could be due to the reason that people are more defensive these days. It could be because people are more educated and aware that there are often more than one way to look at a matter. Hence they use 'I' to explicitly indicate it is their own view.