Don't become a salesman. Become an evangelist for your product. Selling comes in all flavors, but if you're comfortable talking about your product and helping p

Don't become a salesman. Become an evangelist for your product. Selling comes in all flavors, but if you're comfortable talking about your product and helping potential customers understand how you can help them, then focus on the pre-sales process and let your partner close the deals. You don't have to be a bare knuckled closer to be a salesman. Many CTOs in startups are actually glorified sales engineers--I know I was. After the engineering grew they became self sufficient and I spent most of my time with customers, helping them understand how my product could help them solve their problems. I never once negotiated a deal, we had "sales guys" for that--but I was most certainly selling.