Guess I just prefer languages that do it this way:

class AClass {
  var aProp = 0

  fun aMethod() {
    aProp++
  }
}

Though I suppose confusion and bugs can happen when you do something like:

class AClass {
  var aProp = 0

  fun aMethod(aProp: Int) {
    // `this.aProp` is needed to access the property
  }
}