I think it all just depends - I had vacuum with DD and then her shoulders got stuck so I ended up giving birth with my knees up near my ears! Worried about this happening again, and about the baby being bigger 2nd time around (DD was 3835g, so not that small) my obs insisted that the actual bith is much easier 2nd time around and that if the baby looks like he'll be big then they may just induce me a week early. I definitely don't want to do that, I'd rather go into spontaneous labour, but we'll just have to wait and see.

In any case, having ANY sort of intervention does NOT mean you're a failure - it's an achievement to carry a baby for 9 months and to birth them healthily in any way that needs to happen, and then recover from the whole thing physically and mentally, and then raise a child... so just be proud of yourself no matter what!