For the scents. The hobby is in training your nose, I guess - a bit like sampling wine or terpenes. I gave it up once I a) ran out of room and b) snagged a bottle of a many-years discontinued unicorn. Seemed like a good time to move on to something else and I've still got enough fragrance to keep me smelling sweet for the next 15 years
Hikeability is big factor here, in terms of battery life and durability. A metal stem for the TM2 could be a game-changer, for me - thanks for the heads-up about that. I'm not a huge fan of S&B, per se. The advantage of the Mighty+ Medic is that it's HO-approved, so it's as legal as legal can be. It looks less like a weed device than the TM2, as well. I can see me being a cart user in public, generally. Hiking is possibly the exception to that rule - there's something about flower which is nice in nature, especially with sparklier strains. Lucy in the Sky sounds like hiking dreambud.
My Crafty+ needs regular cleaning, by soaking - the TM2 sounds easier to clean than S&B devices - that plus the price of the Venty is why it hasn't really been a consideration,
to be honest.