I found over the last few seasons that I lose the buzz on and off, usually it was seasonal - as I learnt the water I was on, it became obvious that they had shut down for winter. I was wasting my time. I had another water that I lost enthusiasm for during the summer months as it was so busy. I only had two of the "A team" to catch - a 35lb+ common and a 21lb+ linear. But the lake, which was only about two acres, was always packed out which I didn't enjoy. I brought a cheap club ticket with a new pond on it and that got me going again. I had a new challenge and it fired me up to get the rods out until the winter when the two acre lake was empty of anglers. I returned for a two night session on the two acre lake, had it to myself and caught the common at 37lb 10oz and the linear at 24lb as a brace in a 4hr spell, both on maggot rigs. (I haven't been back)
It's easy to get stuck in a rut and if the venue isn't calling you back each time, then maybe it's time to bid farewell and look for a new water to fire you up again?
mind you recently, I've not been getting on the bank as much as I could, although I want to be there when I cant, when the opportunity comes up, I can't be bothered! Unfortunately, this is down to working long hours and not having the energy to get going!