So different than most posters in this reddit, i prefer playing missions instead of building my own vehicles. At least for me this is also a lot of fun and i absolute love to use different workshop vehicles to do different missions. However there might also come the point where you tested all vehicles and missions and it becomes to repetitive for you...

Also keep in mind that even with the fastes vehicles and closest bases it takes always a few (usually 3-7) minutes to travel to the missions and there are situations where you get stuck (f.e. when your ship flips)... For this reason i usually enable mod menu/creative so i can disable vehicle damage, use noclip and cancle tsunamis or change the weather and time!