Early in the morning, 7:30 or 8:00. Then, I have the rest of the day to do my "Honey-do" list.
Also, in the fall and early spring, for us Northern golfers, I like to tee-it-up right after the frost warning is lifted.
Between 10.00 & 11.00, Mon. through Thursday. If the Mrs. has to work on a Saturday, she gets a Comp. day off during the week. She gets to sleep a little late, we go out for Breakfast, and usually have a crock pot going for dinner. That's our golf day's together, usually ruined by little white balls.
If it's just with the guy's though, I let them decide, it's usually earlier. When She's in the cart with me, games usually are "a date day" even when we play with the boy's. When I'm out the the guy's only, I am a little more serious and focused.
We all avoid Friday and weekends at all costs.
The gang and I are lucky, that we have flexibility at our jobs to make this happen.
On Saturdays, 8AM is my time and has been for years - like it better when we start on the back 9 so we see a cart girl within the first few holes.
If I get out on a Friday, I prefer before noon - the big money noon game tends to move a little slow and playing through 4 or 5 groups means rushing on those holes.
On weekends at the local course, if I'm going out alone, first out of the box. The guys at the course let me take off before they open and let me pay at the turn.
If my buddies and I are traveling to farther course, we leave early enough to get as early a tee time as we can, since we always play 36 when we travel to a course. We all play fast and hate to get held up.
Weekdays at the local course, not much choice. After work and hope its not too crowded. I like these the least, especially spring and fall when you can barely get 9 in before dark if you get held up by slow play. Summer is OK when I can get 18 in.
My Sunday foursome usually plays a 11:30am tee time. I like it because I can have breakfast with the wife, play 18, then have plenty of time to make dinner and relax before I have to go to bed (I work early mornings). If I get a chance to play during the week I like between 3:30pm and 4:00pm. I can get in 9 and still have time for dinner and relaxing before bed.