-it really piss's me off when i smooth a selection of faces in Max and it doesn't spread the smooth evenly
lol Tell me about it,Wings3D rocks for that,just select and hit 'S' and get a well ordered quadrupled face/multi-faces.
Like you say it eases the process of making breasts.
Other than that,well you can't pass over Softimage Xsi's great 'poly subdivision' tool and the many division shapes applyable(plus,diamond,X or triangle) sometimes even doing the job for you or leaving just a few edges to fiddle with in order to create the right topo.
For my part on splines,IMO they require too much discipline,although yes,Max's are easy to play with and get a good silhouette started.
Modeling Tip of the Week:The more details you put on a model,the more you will learn from it!