I may be an outlier, but variety has worked well for me. Both for developing a more appreciative palate, as well as one that's more adaptable.
For me, that means I've tried easily 100+ blends in the last few years, and I've got at least another 150 on my shelf ready to try as my whims dictate. Which tin to open next is a delightful dilemma to me. (95% of my tins staring back at me have a sibling or a whole family living in the cellar for the future.)
I can now appreciate more variety than when I began, and that in itself seems to help prevent me from getting what I feel like is "palate fatigue". Even a blend I love from the first whiff, gets a little boring by the end of a tin and I'm really ready for something different most every time. Fortunately, I've enjoyed at least 80% or more of the blends during this process.
I wouldn't recommend buying enough to stock a B&M like I did, but I don't have any regret yet. I may find I stocked up on "English" and Lat-heavy blends a little bit but I'm not too concerned yet. My palate seems to be like that crazy friend that you never know what's gonna happen next time....
I'm ok with how I've done it, as this seems to be an activity I'll participate in for many years to come...