Like any boat, the type of dinghy you buy is totally dependent on your uses you intend for the dinghy.
We don't have a dog (or teen-age boys) to take ashore (so don't need a large or solid bottomed dinghy), we use our C-Dory to explore the shallows and side channels (so don't need a dinghy with a motor)for "exploring", we don't like to lift heavy weight out of the water to store on the cabin roof (so use a very light-weight dinghy), we don't care to tow the dinghy since it is one more 'thing' to keep an eye on when manuevering in tight spots or coming into a marina, and we buy Timex rather than Rolex (with the idea we might need to replace more often, but in the long run probably be more economical and we're sure not trying to impress anyone).
So, we bought a little Sevlor (often on sale at West Marine or any larger 'camping' store). We have several small inflatable Sevlor inflatable kayaks we use for running white water rivers. But, for the C-Dory we use an inexpensive Sevlor dink inflatable we carry on the cabin roof when we want a 'life raft' and or a means to get to shore easily in areas with high tides. It is very light, inexpensive, and we have yet to punch a hole in any of our Sevlors -- and our teenage kids love to jump in and row around fishing or 'messing around.' It doesn't row as straight or easily as solid floor dinks but that makes it more fun for the g'kids and we don't mind since we don't use it often. And, it stores in the back seat of our truck in a relatively light-weight, small bag between times when we have it on the boat.