Croydon takes a lot of stick -- it was heavily bombed during the war, with any remaining traditional aesthetics being destroyed in the '60s under a council masterplan to establish it as a centre of commerce. It's a "working-class" town in unfashionable South London, with high levels of poverty, and of course was hit by rioting in 2011.
But it's also cheap (for London) and easy to get around, generally friendly, and has various places of interest if you know where to look. It also has a number of local blogs and webpages, including the excellent Completists' Guide run by Kake Pugh (http://croydon.randomness.org.uk -- a sometime OSM contributor herself I think). As you can see if you click through, it's a treasure trove of POI info. So instead of gathering POIs from scratch, I've been able to print off details from the site to take with me on surveys, making notes where needed (kinda like Walking Papers). I've now added building and shop info for all of central Croydon, with only London Road (aka West Croydon aka Broad Green) to go.
With a new shopping centre and various "public realm improvements" planned, hopefully the town is on the up, and maybe OSM (and the Completists' Guide) can help in some way, who knows.