I know what you mean Dan. My first bike was a china motor on a cheep department store bike. I was working 12 hour days at the time. I put it together late into the night and first thing into the morning.
Before I went for my first ride I gave it some thought ''true story'' and went to the restroom for # 2. Figured the least I could do is save the paramedics from cleaning my shorts lol.
I did not know how this pig was gonna do? Darn thing fired right up totally surprised with kewl power to me at the time. Went around the block checked chain alignment etc.
I road that darn thing all day into the night. I loved it. I then started with the usual Newbie stuff. Been hooked ever since.
Now the fun part is planning them as much fun as riding them.