It's pretty normal for most of us to go through a "building block" every now and then. Last year was my most productive building year ever in that I finished a total of 21 models. So far this year I think I've only finished 3, and I haven't touched anything in almost 3 months.
Once the weather got nice I started spending more time outside and doing some household chores. We've had a Handyman do a bunch of jobs around the house that I'm unable to do and I've been chatting with him and watching and learning while he's been here. I just haven't had the desire to sit at my basement workbench these last few months. Now that Fall is right around the corner I know that I will get back to my bench because it won't be as pleasant outside. I've got dozens of 1950's car kits, promos and old builtups to work on to try to enlarge my collection.
I'm pretty sure that after this Labor Day weekend I'll be back to spending 4 or 5 hours a day at my bench cranking out the cars again.
I wouldn't worry too much Chuck. Your desire and drive to build will return as strong as ever before you know it. Try jumpstarting it with a simple Snap Kit or a quick Box Stock, or even a quick Curbside Promo to get those juices flowing again.