Lat/long
I second QDM's "find lat / long very confusing and difficult to visualise".
In the old system, it was OK because I could look at a day's list and see where to limit the region of interest by relation to other places I know. (My gliding club needs nothing south of Croxley Green which always features, and there was usually something further north I could recognise to limit the range. Ditto for east and west limitations.).
Today I got the NOTAms for us, found buried in the rest a rocket event up to 15000 feet at Heckingham - just west of the meridian and south of the 53rd parallel, so I thought it might be in range of gliders from Essex. Turned out it is in Lincolnshire and of no interest to us today.
(They often don't put something more helpful, like a county, in the descriptions. Of course, they do mention "Wales" which is apparently within 50 miles of the "narrow route" I have to use to find East Anglian data, as I pick up NOTAMs in that region of a mil - oops, nearly said what they told me I must not use, copy or pass on. They do give counties where kite flying goes on. If NOTAM originators don't give such data, it's a pity AIS can't fill the gap to help the rest of us - but I suppose it's cost again.)