Good thread. However, the answers vary as much as asking
"What's your favorite restaurant?"
For cheap food, for ambience, for convenience, for the best service, for a date, for overalls....? Etcetera.
The Art Knife Invitational (AKI) and it's now defunct east coast counterpart (Boston Art Knife Invitational) are wonderfully
exclusive venues. The 'creme de la creme' in makers and collectors attendance, and it's quite the experience in rich tastes. I'm so glad the AKI survives. Phil's legacy kept this difficult business model thriving.
Same format: My experience is the Solvang Show has OUTSTANDING makers in attendance, more of them than the AKI, and the lunch and dinner spreads are VERY rich. The location is dreamy. Both are limited in attendees and are costly to join, but hardly costly compared to the experience, and for the knives being offered. (My personal favorite if I had to choose ONE. Dave Harvey and crew are unsurpassed.)
Milan & Sicac Paris, I am told, are outstanding! Someday....
The ECCKS in it's sheer variety of TOP quality makers AND dealers in attendance covers even more ground. International appeal and attendance of an extremely high magnitude. Just show up and pay at the door. This year an hor d'oeuvres and evening open bar bash was included for many. (Fifty Fifty Productions does it RIGHT!)
And then there is BLADE the giant mega-mall of knives which is like going to an amusement park: You are worn out thoroughly by the end, and didn't see
half of it. As Paul suggested it's a social gathering. (Harrumphh.

)
Who can beat convenience? If it is close and doesn't take a plane ride or ten hours driving, that's a GREAT show! Chuck's mention of the NCCA shows are making me guilty for missing them in the past few years.
The MOST
fun would always be those
smaller gatherings: Hammer-ins and overall 'invitationals' which are low-key. Very intimate. The Fisk weekend and Josh Smith's (past) weekends are a hoot to those who made it.
Each of them has their benefits and detriments.
Funnily, I have spent the MOST time at a show at the NYCKS in NJ, because it's the least busy of my popular set-ups. I actually go in and spend an hour browsing and talking, but invariably someone gives me a knife and I'm back to work.