I shave my face and neck every day unless I'm on vacation (like now!). Then, it's whenever!
I grew a thick & well filled in beard last year between Thanksgiving and Christmas, because my gf wondered what I'd look like in a beard. (I look like a strawberry blond Ernest Hemingway.) The last time I had a beard was when I was a junior and senior in high school. I grew a beard then just because I could, and to annoy my parents. Beards are way too much work to suit me (I like 'em at an even height, so after a week or so of growth, there's a lot of clipper razor time to get everything just right).
I have short head hair (#1 clipper around sides and back, about 1/4" longer on top, blended together), sideburns cut flat at right angle to the top of the ear opening.
I shave at the sink, in front of a mirror, use a 4-blade razor, and Edge shaving gel or creme, which I buy three cans at a time at the grocery.
I trim my chest, arms, and pubes every now and then with an electric trimmer (Philips Norelco BG2040/34) and guard (#3, 4, 5 depending on my mood). I never shave my legs...the hair there doesn't seem to have grown since 7th grade or so. It's more like fur than hair. I hardly have any hair on my back...my butt hair seems to be at the same fixed length as my legs. I shave whatever hair there may be on my cock, down to the root, usually as part of my shower prep before I go on a date, That hair doesn't grow very fast, nor come up very far -- just enough to be annoying -- so it's not a regular thing.