It depends on how you plan to dive, as diving with a DPV is completely different than swimming.
If you are the only one on the boat with a DPV, you have to make sure the operator is OK with you diving solo, as there is not much point to trying to stay with a buddy that is swimming, unless you are towing them somewhere. Diving solo is very relaxing, if you have the skills, situational awareness and demeanor to calmly handle ANY issues that may arise. That said, there are a lot of people that should never dive solo. If you do decide it's for you, you go from looking at small stuff to covering a lot of ground and focusing more on big stuff. Nudibrachs and gobies lose their appeal when you can follow dolphins, rays and sharks around.
There are times when I've dove with guys swimming, but that was because they were on rebreathers and I was open circuit, so I used the scooter to drop my SAC rate and increase my bottom time. You have to have a scooter that will go slow enough when you do that though, as not all scooters can have the speed dialed back to 50fpm or less, otherwise you are constantly on and off the trigger, which is really annoying.
Most people that dive a good scooter think it is the most enjoyable piece of dive gear they ever owned, but those who try to save a buck with an el-cheapo model quite often have bad experiences, due to flooding, and/or having to swim back while towing it, when it fails.
You will use less breathing gas with a scooter and you will not be stuck diving around a large group of flailing tourist, but you will also get colder, since you're not swimming and if you don't have good navigation skill, you can get really lost with a scooter.
