I've had experience with fistulas, an AV graft and a catheter. Out of all these options, I preferred the catheter. Reasons: comfort, mobility and quick hook up/detach from the machine.
It caused me very little trouble and I never had an infection. Just it clotted up but was fine after they shoved in some Drain-o.
The thing is that I was always nagged to try another fistula or graft. The doctor always brought up better clearance with a fistula versus a catheter. As well, I was reminded about the durability (not sure if that's the right word, but whatever) of a fistula over a catheter. Such as I would get longer continued used out of it. The doctor and vascular access team were concerned I would use up all my possible spots for subsequent catheters and wanted me to save my neck veins for old age. It's kinda funny that they think I'm going to be still around doing dialysis in those years... but sure, okay.
It will be interesting to see what your doc says if you decide to stay on the catheter. At least in my case, they pressured for a fistula and had loads of pamphlets to "lead patients in that direction."