BUILD UP YOUR LEGS! Not only will you look more balanced, but it will help raise your metabolic rate.

Since you are top heavy, rather than bottom heavy, concentrate on shorter, heavier sets for your legs, and (I hesitate to say lighter) less-heavy, but longer sets for upper. This does NOT mean light. It means that instead of picking a weight that you could do three sets of 8 with, and barely get through them, pick a weight you could do 4 sets of 12 with, and barely get through them.

And don't be afraid to switch this up from time to time. You may well find that higher volume workouts work better for your legs than you think. I do TONS of volume work with my legs.

Have fun, and I look forward to seeing how you do.

Cheers