I have an assortment of jacks depending on the job.
For my car the factory jack and a nice floor jack (Hydraulic) Which I truly like and use.
For the motor home.. Depending on the job an 8 and a 12 ton bottle jack. The 8 ton gets used for all sorts of GP stuff (not tire changing) like leveling and holding the flag pole away from the body on some sites and bending metal.
The 12 ton is a harbor freight AIR/Hydraulic jack-jack... I hook up ye old compressor, and using just two fingers pick up one corner of the motor home.... If I could build a proper frame and properly balance it,, Theory has it it would pick up the ENTIRE motor home.
Gets some strange looks though when I tell folks "I can only pick up 12 tons" They understand once I show them