Bad and good about changing the job often

I tempt to write this blog because i was recently in a situation to think deeply about this.
When i write this i work for a company where i do 24/7, no weekend holidays.

Since i love my analytical skill, i like to do some research about the issue on day to day work. But here i do such type of work only on day time. Here i completed 8 month so i was not thinking about to change the company and also my profile would look bad if i change my company now.

At that moment, one my friend had called me to say about one opening in his team. As i had already in bad mood about my current work, i decided to attend the interview but did not decide to go out. Luckily i got the offer which is very good and far more better than current work. There is no night shift and weekend holidays which is i want to.

So, this topic was raised in mind whether it is good or bad to change the job often. As per opinion you can change the job if you are going to get what you want. There will be a lot of opening always for experienced guys and they just need you. But everything depends upon your mind and you need to just enjoy your work wherever you go and should be worried for changing job often.