If you start a sentence with rather than, would you use the infinitive or not?

Is there some sort of rule? Which is correct?

Rather than driving/drive home intoxicated, he decided to call a cab.
Rather than studying/study for the exam, John partied the whole weekend long. Rather than describe/describing her to you, I am sending/will send you her picture. Thank you

The participle (it's not a gerund) sounds a little off to me—it does not sound grammatically parallell with the main clause. Use the infinitive, and you can't go wrong.