My first backpacking trip was in 4th grade with a pack that we borrowed from a pawn shop. It was an orange external frame that I couldn't even guess the brand. I have moved up in the world quite a ways since then.
1. 6th grade I got a Kelty Frame pack, and it turned quickly into my meat hauler as a teen.
2. Daypack was a cheap Walmart camo thing. I didn't have any money in college, so this was the way to go for a few trips. Terribly uncomfortable but I got tougher.
3. Badlands 2800- Bat Wing stinks on ice, paid way too much for way too little performance. Broke it several times and will never buy from Badlands again. So frustrated with that thing by the end of it's life that I gave it away.
4. Black's Creek Mossback Edition Bounty Hunter- Way too heavy, and provided me with just about zero shoulder lift. I liked that I could detatch the bag and have a daypack frame. By the end of this pack's tenure I had trimmed all of the compression straps, cut out extra material, and even cut the extra shoulder/hip harnesses off the bag to get it to a decent weight. I never broke the thing, so that is a plus, but it was built for someone 6'2" at the tallest. 135lbs of elk last fall was about all that I could handle. Pad ran flat on my back for the most part all the way up so I sweat like crazy.
5. Kifaru Duplex Frame with Longhunter Standard and Guide bags- Biggest selling points were the limited contact points on the back, proper shoulder lift from a 26" frame, and the ability to change bags on one frame. The limited contact points helped with breathability which means I don't have as big of sweat spot on my back. That in and of itself is a huge plus. The duplex frame also matches the curve of my back, and I can bend the stays to match it even better if I so choose.
I didn't like the top lid offerings so I added a MR Daypack lid. To save a little bit of weight I cut the shoulder straps off of it as the longhunter compresses down plenty for uses as a daypack.
I tried on a MR and quickly realized that many of the complaints that I had about the Black's Creek would be transferred over to the NICE Frame system including lots of pad and lack of shoulder lift. Especially if I used the Crew Cab or Longbow for shorter trips or as a daypack. I would like to try on a Stone Glacier just to see if I like it, but will wait for more reviews. Haven't tried on a Kuiu either.