Another wireless-only person here. I like having one phone only. I like not getting sales calls, and it is just simple to have the one wireless phone.
I don't feel obligated to answer the phone if it rings...in fact, with wireless, people never know where you might be...so I feel that it causes fewer assumptions about whether or not I can answer at any given time.
People don't know if I'm at home, in the gym, on a date, at my office, in a meeting, at the movies...etc. I have had some friends worry at first about calling me too late, and I just make it clear that if I have gone to bed or am not available, I simply turn the phone or ringer off. They know I don't always answer.

