I get the feeling that in 3d you pick a tool and then end up somewhat married to it. I have to say I wish I knew more about it all!!
Of course each artist leans to a particular tool of choice… usually the one they began using to start with- for me that was 3D StudioMax… with that said though- the great thing is that although there are several different choices the principles and practices are basically the same. What this means is it simply comes down to learning a new UI per program and picking the one that works for you. File formats are very versatile outside the software native~ .OBJ, .FBX and others can be shared in almost all!!
It is truly a great field to be a part of