I say stay wherever you are having fun - farming isn't everyone's cup of tea, do what you like doing the most and don't let the farmers tell you you must drop trophies...
I've pushed to around 1900 as TH7, purely for fun, but also looking for big DE hauls - it was good and I got plenty of loot especially the dark stuff. I maxed my base somewhere just after that, then moved on to TH8 and lower trophies, which quickly because boring, so now I'm up over 2000 as TH8, and it's fun again. I can always find loot, well 6 days out of 7, just by looking hard enough - there are still poor bases to raid for trophies + loot, and abandoned TH9 and TH10 which can be farmed for crazy loot even with TH8 (although getting 50% is pretty much impossible as these bases have been farmed up to Crystal for a reason). Your raiding skills definitely get a lot sharper...
