I quite enjoy playing with the 1 year=1 turn style, sure things take longer to happen but like Didz is saying, you get time to fully develop your empire more. 450 turns is long enough for me honestly so I don't think going as slow as 6 months to 1 turn would interest me in the long run.

Best of all, your characters don't live for more than 120 years yet only be at age 60, like they do with the Vanilla setting I like playing with the years put back in as well, rather than turns.

One thing that i don't like too much is how certain mods use the 1.5 year per turn system, or similar, but have boosted build time and costs way up. They are still great mods of course, and I really enjoy them, but my style of play doesn't leave much spare cash floating around and i've found the increased building costs to be a challenge , build times I can handle though