Much of the old essay material is dated and irrelevant. While you want a flair of something interesting in your essay, these days schools don't allow much room for extra imagery.
A couple things:
1) Make sure to use active voice (I felt, I learned, I inspired, etc rather than what I have learned). Not only does it save you words, but it reads a lot more personally.
2) While schools will tell you not try and satisfy them, schools definitely have personalities and using a different style is probably justified. For example, there are touchy feely schools that I'd expect to have "fluffier" responses. Other schools are going to be somewhat more down to business. So "boring" probably will not hurt you.
3) What's going to make a difference is not your style, it's your content. So where someone tells their leadership story in what's basically a bulleted list put into sentence structure, you need to go past that and describe the why and how. That's where your essays will stand out.
If you're energized about writing them, they probably won't be as boring as you think. If you do look at them and think they need some spice, then pick out the points in your essay that you really want to stand out and concentrate on those. So instead of saying, after that I decided to take the next step and change teams to do xyz, spice it up and say because one of my strengths is that I love to push myself, I changed roles because it I knew it would force me to address my weakness of xyz. If you do that in a few extra words, you've told them a lot more about yourself.