Workflow wise it takes some time to get used to.
For example I've started first on 3d studio (dos version, not even max), after some 3dSMax jump into Maya 2.5 and that was already huge improvement and felt much better workflow wise. And then again going from Maya 8 to Softimage 7 was again huge improvement, but over all it was like using what you are used too but improved version. But overall it was close enough to make fast jump.
With Houdini it is not really that simple as there is a bit bigger difference in whole logic so it is taking a bit more time. There are strength in Houdini but being so different from others is what makes jump a bit slower. Just slower not impossible.
On the other hand, Blender that for who knows what reason introduces completely nonstandard view port interaction for example was harder to me then Houdini

You go to somewhat familiar interface with viewport and all and you can;t start even going around the scene in somewhat logical and what is used to be way in all major applications… Really bad. For me at least. In Houdini at least fundamental things are same and then just need to build around new logic.
As said like a while ago.. for exmaple:
In Maya you workaround,
In Softimage you work.
And yes SI feels like a glow. But again that could be because of getting used to but also having really nice organised workflow.
I'm still lacking time spent in Houdini to be able to figure out if it is workaround or work model

Hope it to be second one. Again I do not NEED to learn Houdini nor having some immediate pressure but for future proofing it seems to be on a better path then Maya and honestly every day having to use maya for work is PAIN!
So why not try something else just to keep sane.
Back on Houdini and character animation, you may be perfectly right BUT there is still lack of pool of riggers. Let's say I have a project and need nice rig done in Houdini. Where to find rigger?
As a matter of fact I did had project and even twas thinking to use it for testing animation in Houdini as it is rather simple but riggers.. no go. So back to Softimage.
I could use this to call out for any Houdini riggers as well to add to my page
www.cgfolio.comJust something I created a while ago to kinda have nice pool of people and be able to filter out fast the skill needed and availability and get in contact with talents needed faster then standard post ad, wait for reply, go through emails… contact them .. etc.. was looking days if not weeks searching for people like that.
So any riggers and other skillet around with Houdini talents are welcomed to add to the list