Look Miss D, it's very simple
Growler: fleet of vehicles and lots of off roading = wants to talk about cars a lot and take you to muddy places. Never seen at weekends, likely to have oily fingers. Likely to have lots of muddy/oily mates who eat too many bacon sarnies
BM: One Pajero and lots of bikes which he takes to bits as soon as he gets them = tinkering buffoon who is forever whinging about broken bolts or whatever. Spends all disposable income on gadgets.
TMR: obsessed with old motorbikes, likely to break down a lot and spend hours in futile repairs. Seldom seen outside of garage. Uses Swarfega and it shows.
Tel: walks everywhere. Wise given excessive Young's intake
and so on. Simples