1840s railways; British H0 / HO; the railways of SE England 1801-present; microlayouts; industrial, dockside and light railways; social and economic impact of the railways; admiring other people's work and nicking their ideas!
To be fair to the man, it's also my own fault. If I'd only managed to convince myself that I really needed a couple of extra loco bodies 24 hours earlier, I'd have saved a few quid.