Its difficult to cut down to single brands because the designs of the one that you like is also similarly transferred to the next latest model from the same brand. So, the vicious circles continue until one day you realized that you actually have more than a couple of watches from the same marquee.
I for one will try to go for variety regardless of marque. For example, purpose built watches eg..divers, sports, adventures, dress etc..which then branch out to mechanicals, automatics, quartz, anti-magnetic, kinetic, and hopefully a tourbillion ...
Would I give them up ....? depends on my needs of the moment...