With all due respect to Nikon, the OP did not ask whether switching to Canon was a good idea. His question was very different.
There is a very good reason to shoot with the same system as your friends. You can exchange lenses, and get advice from people you trust.
That's exactly my point. I don't want to argue about which system is better. And my question was different.
Since I lost my camera and needed a fresh start, I decided to move to canon because I do not have all that money right now to buy all those Nikon things again. So I chose canon, getting help from friends for gears. I am going to invest this savings in future.
And to me, I personally don't think Any camera body will change the way I take photos or I see things, I just need to spend couple of weeks to become adjusted with the new button layouts and handling. The thing matters to me the most is using different kinds of lens & that I will get from friends before my further investment.