I think there are advantages to both. I feel some cycles should be at least 12 weeks, ie. those with EQ. I don't really notice best effects until around this time with EQ. I feel longer cycles allow the body to better adjust. I also agree that longer cycles are harder on the HPTA, but with proper PCT you can still recover fine although it may still take longer. Shorter cycles may not inhibit as hard. I used to run the traditional 8 weeks on, then at least 12 weeks off. But I still gained better and held onto more when I increased the length to at least 12 weeks. There is alot of hype about shorter 2-4 on and 2-4 off with shorter acting compounds, but I haven't tried this yet. The concept is interesting in that it should allow for full recovery between cycles (with proper PCT of course). I am sure there are some good bros here that have tried this and hopefully they will chime in. I would only do this with shorter acting compounds such as orals and prop etc.