Balancing subjective and objective learning styles will add interest to the objective. While a certain group of students may prefer objective learning, they may have a more interesting, involved learning experience if some elements of the subjective are tied in. For example, asking them to act out a play involving math problems will allow them to utilize their objective skills -- solving math problems -- while doing something a little more unique and interesting, which is acting.
For those students who prefer subjective learning, balancing objective and subjective learning styles will add focus to their subjective preference. You may give them the option to be creative with their work, while also limiting them to a specific subject matter to be creative about. This will give them a focal point and a topic to really pay attention to, but they will still be able to be creative with what they do.
Balancing both learning styles will add creativity to the objective. You will give students who are not usually challenged in this way the opportunity to do something creative, which may be some sort of art, writing or hands-on project. Make sure the students know that the point of the assignment is not merely to be creative, but to mix the objective subject matter -- math, verbs, anything with definite rules -- with something a little more offbeat and dynamic.
Finally, balancing subjective and objective learning styles adds structure to the subjective. Students who are very creative may sometimes get so involved in their creative efforts that they do not have adequate structure or planning to finish their project in an organized and successful manner. By giving them a topic and some boundaries to work around, you add some structure to their subjective project. This will allow them to be creative while still having an aim and solid organizational skills.