I usually rent where the price is decent. Lately, I have been doing weekend rentals from Hertz thanks to the nice codes posted on FT. I have been quite satisfied with the #1 Gold service from Hertz.
A few short stories from the 1990's.
1. I arrived at the Alamo at CMH and they asked me if I wanted to upgade from my compact car to a Lexus for $6/day more. I asked if I could use my coupon for $5/day off on a mid size/+. I jumped at the chance to pay only $2 more for the 2 day weekend rental to rent the Lexus. That was in 1996 & they were out of the LS400 so I rented a GS300 instead. Nice car.
2. In the early 1990's, I would reserve a compact car for $62 for a week & I would get a larger car instead. Once, the compact car A/C broke in 110 degree heat & Alamo gave me a new 1992 Caprice that had COLD A/C! I kept the car for 4 weeks paying only $62/week. I drove "old" clunkers at the time & the Caprice was a real treat. Work paid mileage for a couple of out of area trips so the rental was essentially free.
3. Once at FAT, I reserved a smaller car & with my upgrades/coupons, etc., I ended up with a Cadillac deVille & paid only $23 for a 2 day rental. Drove to Tahoe that weekend. ^
4. Reserved a Geo Metro at $39/week in 1987. Was offered a Buick Regal for $20 more for the week. Jumped at the chance as there was 2 of us.

Drove all over California that week!
Renting cars for leisure enabled me to keep driving old cars until recent years. Saved alot of $$. I now own my 2nd new car I just bought recently. Will rent cars on weekends for long trips to save putting miles on my car.