Watch the series you wanted to do and add the inevitable missed cars and thumbnails that can improve IDs?

The nature of contributional work means that there is always another series. Plenty of missed stuff and even stuff that needs upgraded. Before long you'll stumble upon a series you want to do or you've forgotten about that's not on here.

Plenty of times I've wanted to do a series but someone else gets in there first. I've only ever been bothered when I've done the work (think how you'd feel if you had already completed the episodes someone does? It's happened to me a couple of times.). Thankfully (maybe not the best word), it seems that most people who jump in and do series contrib work (outside of the admins and a couple of good users like yourself) either skim and do a sloppy job or decide just to do one episode or a couple of vehicles.