Yes MDMA can have different effects on different people.
Keep in mind that MDMA that you buy is not necessarily "just" MDMA. So even though, you and your friends are all taking "MDMA" it doesn't mean that it is all the same (especially if you bought from different people).
And it depends how much that person uses. If one person is fairly new to MDMA and another has been using for years, there will be different results.
It also depends on other things. Like if I've had enough sleep, eaten well the day before, etc., then I will be a lot more hyper on it than if I just got a couple hours of sleep and didn't eat much the day before.
And of course everyone is different.