I use CFOP, but if I'm being honest, I wished I switched to Roux back when I averaged ~30-45 seconds. I'm sure
@TipsterTrickster can back me up on this: Roux is just more fun. However, now that I'm sub-11.5 with CFOP, I enjoy being fast with CFOP more than I think I would enjoy switching to Roux and having to "get fast" all over again.
In a hypothetical world, I would love to be able to switch to CF1 (Cross, F2L, 1LLL). I don't think I have the patience, time, motivation, brain capacity, etc. to learn all 3915 algorithms, but I'll reassess once I finish full ZBLL