With me, it's mix and match. I have a Rockchucker Iron press for smaller runs and a Dillon for the pistol loads..... and a MEC for the shotshells... All are good so long as your purchase has some heft. By that I mean rigidity. If you are sizing large calibers, there is quite a bit of force applied to the press frame so mass is important.
Don't drop a Rockchucker on your foot.......
Be aware that Dillion is high priced stuff but USA made and quality plus Dillon is only available from Dillon Precision. No retailers (that I'm aware of at least) offer Dillon reloading equipment.
Some Dillon presses only accept Dillon dies so that can be a detraction, especially in the pistol calibers. I reload a bunch of 45's and the Dillon Progressive will turn out loaded rounds quickly and accurately (for powder load and bullet seat depth.
I'm a sit on the sofa and hand prime my cartridges, not a machine prime. I want to 'feel' every primer to make sure it's seated correctly (not proud of the base) and insure it's square to the pocket. I looked at the RCBS strip primer system and thought to myself that it was a waste of time, but that's only an opinion.
I have dies from every maker. I've noticed that Lee dies have aluminum parts (adjusters and such) while RCBS, Lyman, Redding and Hornady and Wilson have none.
Wilson dies are pressless, by that I mean that their dies can't be used in a normal reloading press but an arbor press or a mallet works just fine. Just the ticket for hunting lodge reloading, like the Lee Pocket Press.
I don't particularly care for the Lee locking ring (captured 'O' ring) design. I prefer and refit to the accepted practice of a setscrew locking the ring.
I would say that my favorite dies, as far as ease of use are the RCBS Competition and Gold Medal Die sets, especially the bullet seater. I like micrometer adjustment on seating depth (I believe RCBS copied the design from Redding) and I like the top front bullet window. Much easier to drop in a bullet from the front versus from the bottom, especially with smaller caliber bullets like 22 caliber (.223).
Reloading equipment reminds me of motor oil. Everyone has their favorites for specific reasons. Actually, they are all good. The difference lies in how much you plan on using them, space limitations and wallet capacity.