I realize I'm not sticking to the confines of the framing of the question, but I find the winter months a nice chance to recharge and refresh by partaking in some other hobbies.
For a good stretch of the year, I am a pretty rabid consumer of both real and virtual motorsports. By the time Dec/Jan roll around, I honestly just kind of feel a little bored with it. Maybe "bored" is too strong, I'm still a frequent visitor to RD, I'll check Autosport now and then, etc but I'm just not motivated to watch 2+ hrs of racing or get sweaty palmed chasing leaderboard times.
This time of year, I watch a lot more traditional sports, binge watch some old favorite TV series, watch some movies. Hell, if I get really desperate I might even spend time with my wife and kids!
My own experience: when I try to force the sim racing when I'm not truly into it,
that's when I start to feel frustrated or in a rut. I just walk away and trust that the itch will come back (it always does).