Honestly, I think the approach should be dictated (or least steered) by consultation with the surgeon. I had a retrosigmoid surgery, but up until a week before surgery they were going to do a translab surgery. Why? I asked my doctor that same question... His response was that after consulting with the other doctor doing the surgery, the retro approach gave them the best angle at my particular tumor. To me, either approach would have been fine so long as it gave the surgeons the best chance at getting the tumor. That was of the utmost importance to me.
Read my story (address in my signature). When the surgery approach was changed, I was freaked out (as others can attest to here) but I quickly was okay with it when I found out why it was changed.
My advice, take it for what it's worth, consult with your surgeon to figure out the best approach for HIM/HER to get YOUR tumor with minimal complication.
FYI, I would consider my surgery a "happy end story". Approach is really a means to an end in my book. It's personal with advice from your doctor because he/she has to actually perform the surgery.
Regards,
Brian