A few blends... and quite a few "aha moments":
My introduction (to pipe tobacco) was a very uninformed dive. I was given Ashton's 'Smooth Sailing' and Holger Dansk's 'Mango & Vanilla'. What an intro... (to tongue bite). This prompted research and was my primary reason, I think, for first browsing this forum.
But I digress. For latakia, Nightcap was my gateway drug (haha). I think was the first pipe tobacco that I really clicked with, to be honest and it remains a staunch favourite. Also Plum Pudding (SR).
My next foray was to explore VA and VaPer blends. The first blend I tried was Germain's Best Brown which I initially disliked. I came back to it a year or so later on and it was fantastic. Similar experience with OGS (which I got at the same time, and was dull fresh). That led to Capstan, 507c, Solani's Silver Flake, Marlin Flake and Reiner's Gold.
The next major 'Aha' moment was HH Acadian Perique I think, which I got from a local B&M on the off-chance. I've yet to try Elizabethan, but it's on the list.
The most recent eye-opener was the 'HH Old Dark Fired' (and Peterson's "Irish Flake" I suppose, I bought both, but I prefer the ODF) which properly introduced me to 'burley' and Kentucky notes. This is now inspiring my next order for 'Dark Twist' and Solani's Aged Burley Flake...
I've been resisting buying Peterson DNR's and/or Escudo as I have so many VaPer blends already... but it's hard to fight against the TAD. The struggle is real.