Hi plain old dave.
The Bullet is a fine motorcycle, and it does enjoy some benefits that the bigger twins don't have.
Number one is the old Brit single thump. That's a classic thing that no twin has.
Also, the Bullet is lighter and more maneuverable than the bigger twins are.
And the maintenance and repair is easier, and cost is lower.
It can be easily modified without going into the engine, to yield a good bit more power than stock, and many of us find that to be enough. If you want more, then you can get this baby up to almost 40 hp if you want to spend the money and effort to do it. At that point, it's pretty close to what the bigger twins will do, but in a lighter package.
It's a wonderful bike that gives a great riding experience, once youv'e sorted the little issues out and get it the way you want it. We've all done that, and it's really not a difficult thing to do.
It will always be on the lower end of the power scale, as far as motorcycles go, but if you don't need a rocket ship, and primarily use the bike for non-interstate roads within a couple hundred miles typical ride distance, it will do a fine job at that.
Not an interstate cruiser, or a highway bike.
More of a fun bike for state roads and county roads which have 55mph limits, and plenty of curves.
Now, if you decide to get the newest models with the Unit Construction Engine(UCE), then that will give you some ability to use it on the interstate highways up to 70mph, and they have a bit more power and modern design than the old dinosaurs do.
But, the old dinosaurs have some very nice appeal in their own way as a real fun bike which was the last remaining "real" Brit single to be produced,and was only just recently discontinued because of emission control regs.