trainspotterish

trainspotterish

(ˈtreɪnˌspɒtərɪʃ)
adj
informal obsessed with trivial details, esp of a subject generally considered uninteresting
References in periodicals archive ?
Nerds can get off on the trainspotterish aspects of the series, whose parameters and standings are explained and displayed with clarity.
Someone else who thinks so is the trainspotterish Mr Monkfish, an entertaining contributor to the beerintheevening website.
It's the kind of trainspotterish but nevertheless fascinating investigation listeners to Green's radio programme would have been familiar with.