Well think about it -- this can only come down to three factors: 1. How good the other party is when it comes to collaboration. Some coders work well with othe

Well think about it -- this can only come down to three factors: 1. How good the other party is when it comes to collaboration. Some coders work well with others, and some are lone wolfs. 2. If you have complimentary strengths: One programmer is strong at X and your string at Y. 3. The energy from both programmers makes each party proactive and thus avoid procrastination. I also think there are the larger questions of if you're using a spec, etc.