A good example of this is the length of the drop down for option sets. Take for example, the following form:
As can be seen the drop down for the title is only showing two options at a time. Considering that there are at least 20 values in this option set, this experience is not likely to go down well with end users... and nor should it.
The way to get round this design issue is to add some spacers into the form as follows:
And after publishing, the form renders in a little bit more of a presentable fashion:
The downside is that when the option set is not in its drop down state there's a lot of unnecessary white space on the form.