I miss a few things from Maya but I rarely feel the urge to start it back up because it has more problems than it’s worth.
Take subdivision modelling. In Blender, I make a polygon model and click subsurf and I’m done.
In Maya, polygon objects and subdivision surfaces are separate so you have to convert one to the other or choose polygon proxy to do what Blender does.
But, you can’t edit the subdiv surfaces nearly as easily because every time you try and delete a vertex or edge, it gives an error about making an invalid surface or something - I’m forced to delete faces all the time.
The hotkeys in Blender make modelling so much faster than Maya for me. I don’t like the widgets method of modelling (though on occasions it comes in handy in Blender).
Another thing I prefer about Blender is that you can talk to the developers directly. They even added the edge length and angles feature that I now find immensely useful for 2.37. With Maya, there were major bugs that you just couldn’t fix yourself - you have to avoid them.
Maya used to crash for me if I manually inserted the value for the position of a CV point on a curve so I had to use a script to do it.
I miss a few things but Blender’s pretty good so far. I liked how the Maya internal renderer could produce such nice images (even photoreal) from just a basic setup. But you can always use a different renderer than Blender internal. I also miss the node-based shader system, true (+real-time preview) displacement mapping, the numerous deformers, better camera features (transformation and deformation motion blur, dof blur), better AA, better special fx and a couple of other things.
I used to miss NURBs but quickly changed to using polys only. I don’t like that you can UVmap NURBs or edit them easily so Blender not having good NURBs doesn’t bother me.
Maya has too many menus and features are hidden way down.
I kind of preferred Maya’s scripting because it was simpler and more integrated but with Blender’s Python, I’m learning a language that I can use for other purposes.
In summary, Maya can do anything you need but doesn’t do it efficiently and you don’t learn much using it. Because you have to struggle a bit with Blender, you learn so much more and you focus on improving your workflow.