First labor started with SROM, and contractions pretty immediately followed. I was pushing 4 hours later, but pushed for 2 hours, mostly because I started pushing when they said to, not when I had an urge. This labor was really intense, and I knew I was in labor from the first contractions.
Second labor was really mild - contractions off and on all day with no pain, just mild achey sensation. Took a shower to try and relieve the back ache, water broke, and I thought "oh good, now labor will start" because that's how my first labor started. A few minutes later I had a contraction and wanted to push! I had no urge to push with my first birth and was just overwhelmed with what a true urge to push is like - it was like a train barreling through my body with no way to stop it, not like a conscious urge at all. The baby was out within 20 minutes, in my living room, even with me trying so hard to hold back and make it to the hospital.
Third and fourth labors were similar to each other. Started again with mild contractions, but they then picked up slowly but surely to more regular, intense contractions. With the third, I birthed in a hospital "birthing center" and had a lovely experience, walked, showered, rocked and ate sherbet until my water broke on it's own, and then I had the same overwhelming urge to push as with #2, and pushed the baby out shortly after. With the fourth, I arrived to the hospital just getting in a labor groove, 8 cms dilated, and promptly had a big argument with the doctor over breaking my water. Things then slowed way up, then picked up slowly again, but somehow I got it stuck in my head that the baby wouldn't come out unless I let the OB break my water (I know it sounds dumb, but you don't always think straight in labor) Eventually I let her break my water and she said I was fully dilated then. I pushed the baby out with no urge in the next 13 minutes, because it was almost midnight and I wanted her born in May (it was the 31st.) I think #4 would have been like #3 if it hadn't been for the argument and the tension between me and the OB.