Work wise, as a community nurse what you might want to know about Kirklees:
High levels of poverty
High levels of social exclusion
Very ethnicially diverse – particularly large South Asian population
Very high levels of COPD, diabetes etc. (basically the full complement of health problems you might expect with the ethnic mix and the pockets of rampant poverty).
Living wise, as above basically, there’s some sh*tholes, but some nice places, in summary whatever you want / can afford, from really nice rural / semi-rural locations, vibrant urban, to ghettos and run down LA estates. Although comments above are right that Batley as a whole is a bit grim, there is a quite posh bit too though – think it’s called “Upper Batley”, mind you the house prices there are shocking so might not be relevant to a health worker unfortunately.
And the most important thing, that you strangely haven’t asked – there’s some hills, and riding to be had – more at the Huddersfield end of Kirklees than the Batley / Birstall end though.