I've been playing since Beta Phase 3, but I planned on getting it pretty much just on the word of my friends who I played FFXI with a long time ago, and say ARR is much better than the original FFXIV. I never got into the original XIV for various reasons, and hearing about its suckiness didn't help. But now after hearing all the improvements in ARR and experiencing them for myself, I'm excited to dive into Eorzea and see the rest of what it has to offer.
In Phase 3 I was on Excalibur where my friends also were, but they sort of stopped playing during Phase 3 because they knew their character data and progress wasn't going to be preserved going into phase 4, so I never got to play with them. In phase 4, the open and most recent beta, I couldn't make the first couple of days, so by the time I made my characters Excalibur was full. So I made a couple of characters on Odin (a mi'qote and lalafell) and got them to levels 10 and 11, respectively. My Mi'qote was supposed to be my main character, but I realize I probably won't be able to switch worlds so it was just basically my trial run with the summoner job. My Lalafell is the one I'll really miss, Tenori Taiga, the level 11 Gladiator. I don't think I'll delete her, and if such an option ever comes available I'll definitely switch her to Excalibur as soon as I can.
I preordered the game, so I'll have early access which I think will be starting on Friday. By then lots of people should end up leaving because the open beta will be closed, so that should be my chance to get in Excalibur. Hopefully...