The first shingles shot did not bother me at all. When the 2 shot Shingrex became available my doctor recommended I take it also. The first one hurt a little a couple of days later. Didn't notice anything after the second. Don't remember if I ever had a chickenpox vaccination, but I did have chickenpox, a week and a half or more of constant itching.
Had the flu for the first time I know of last fall. Had a runny nose and a light fever, the fever lasted 2-3 days, the runny nose lasted about 10-12 days. Did not feel like any description of the flu I have ever heard of. I started feeling it a couple of days after my wife showed symptoms. She tested positive for flu and Covid.