I don't believe it makes any difference, except obviously it will cost you the £495 in fees. I think what you need to consider is can you wait? Do you have any creditors that have CCJ's? Can you cope with the phone calls? You need to think about the waiting process if you decide to hold back.
it can cost a creditor up to £2000 to make you bankrupt so whilst you may get threats about Br it is actually only around 15% of Bankruptcies that are creditor let and a huge proportion of these are from HM Revenue & Customs.
I always believe it is better to be in control of your own destiny and decide what happens to you and when.
If Br is the right solution then take control yourself.
It could be worth you posting to outline your circumstances so we can help you decide if it is better to go ahead yourself. You do get more control of the situation by stomaching the fee and petitioning yourself. You could wait for ever if you wait for a creditor to do it.