I think your question got derailed by the 'no stoploss' debate. Anyway, you mean like a weekly target right?
I feel that if your trading is going well and you are disciplined and making wise choices, you should take advantage of opportunities as they come along. There are going to be weeks where it's slow, out of season, sideways, etc., when you will have to sit out of a lot of trades by necessity because they are not good trades. So why not take advantage of the market when it's moving.
The risk is that you become obsessed and start making risky unwise decisions to fuel that adrenaline high that you get from trading. I had a period of time like that, and I took off from trading for a long stretch (like 2 years!).
Not suggesting that everyone do that (I had other life-type situations that I was dealing with as well at the time) but when I came back, I didn't feel that impulsive drive anymore to constantly be at it. In fact, I felt renewed and my understanding seemed to deepen. So, I think that the answer to your question depends on your personal discipline and level of trading.