I really don't know too many general ob attendings who are not working very much. A lot of people go into subspecialties such as MFM or REI to limit their work hours.
I work part-time for a group that I used to work full time for (where I did deliveries/took calls). I don't make much now, but it's my choice. I can't say that I miss that part of my life. However, most groups expect you to take calls. The most junior partner usually takes the most calls. I do have to agree with you that the joy of delivery a baby does wear off after first 100's or so.
Getting sued is part of medicine these days, but especially true for obgyn. as a resident, I was named in 3 different law suits, but each time, I was dropped from the case, or the plaintiff decided to drop the case. Maybe because I was a large university hospital with a lot of high risk cases or maybe philadelphia has a very litigious environment. I can't speak for all obgyn, but getting sued, for me, is very likely to happen.
I think I underestimate how important life style would be when I was a medical student.