@Saul
Personaly, I have nothing against buying, or in all reality - that would be collecting - rifles from same maker. It could be due to pleaseure and pride of ownership, or due to need of various calibers, say for hunting on competition.
Having said that... my inventory is totaly diverse, not having two pieces of the same maker.
But this is accidental. I will explain.
When considering to buy new rifle, or pistol, I make my own check list - and that does not include the brand, but only technical specs and general utility of the firearms.
For example:
1. Choice of caliber (for hunting or target shooting, training, or specific hunt or sport disciplne), standard calibers - common calibers (vanilla), or less common - which will be harder to get in the shops? Price per round in the shop? (especially for target shooting purpose of the firearm?
2. Magazine?
Fixed, or removable? (there are pros and cons for each)
Capacity? 3-4-5? 10?
Plastic mag or metal?
Single stack or double stack?
Or even a singe shot?
3. Action?
Break action, double rifle?
Pump action?
Lever action?
Bolt action?
- turn bolt? Rotation? 60 degrees? 70 degrees? 90 degrees?
- Linear action? Which linear action with radial locking lugs, or rotating lug system?
- push feed / control round feed
Other action types?
4. Stock?
- Compsite, wood (which grade), laminate, chasis?
- Thumb hole, pistol grip, full stock, monte carlo, english stock, etc?
5. Sights?
With or without mechanical sights?
6. Optical sight mount sistem?
- Piccatiny? Factory designed mount system? Dove tail? Drilled and tapped only?
5. Trigger system?
SIngle set trigger, double set trigger, etc?
6. Safety
2 posn safety, three posisiton safety, latest " german forspanung", tang safety, etc etc
7. Barrel, if that is important?
Forged barrel, button rifled, cut barrel? In addition, chrio treated or not?
Chrome moly, or stainless?
8. Barrel profile?
9. barrel lenght?
20 inch, 22, 24, 26?
9. General specs:
Over all weight, overall lenght, LOP, etc etc
Once when you click and choose to each point of your future rifle need, and this is how I choose my rifles (similar for shotguns, or pistols), you will see that it is impossible to have collection of rifles of the same maker for all the purposes.
You will aslo note, if you click to the check list honestly, then from all those avialble brands, you will come down to one very short list, with only few acceptable models, of different brands.
So, most probably people having rifle collection of the same brand are actually that brand fans. Nothing wrong with that, but it just comes down to general motive of buying, utility, or collection.