I do commercial and residential valuations for a couple communities. My experience is probly not the norm tho as I work for a contract assessing company. No politics, no pressure, no silly meetings/classes and merit matters. Most residential inspections are now pictometry based but I did spend my first few years walking every street for inspections. We still do that for issues that cannot be resolved via GIS/pictometry. Good phone etiquette is a must as you will be answering questions from taxpayers who are not always happy and generally have little understanding how property tax works. Not sure how your state is setup but here we do yearly mass appraisal. The cost approach is fundamental to this. I do a lot of statistical analyses, market analyses and excel stuff. I've sorta niched into also developing excel apps that simplify many of the tasks we do...even teaching a class on it this year. Currently building up GIS skills.
The biggest adjustment for me was breaking from the singular property mindset to a more neighborhood or commercial occupancy class based approach. Meaning, I'm not so much looking at a retail property's value but all retail properties and trying to establish statistically relevant values to that class. We don't expect to get perfect on a single property but we should be pretty close on all similar properties.
Land valuation underlies most everything (duh). Those skills will be very useful. Most of your appraisal skills will translate very well. Assessment administration will be a whole new thing to learn and master.
You may be required to appear in court/tax tribunal to defend your work...not as scary as it sounds. Most of the big ticket disputes will be handled by the attorneys and contracted appraisals. Likely would be doing valuations and defending for smaller/simpler commercial properties. You will produce appraisal reports for these. IMO the best judges will tear up both sides and come to a conclusion...great learning experience if you possess the ability to take criticism.
You will witness issues that will likely never come up in private practice. Some will frustrate and some will fascinate but, to me, always be interesting.