Being a dog owner is something I will always be. They are such wonderful companions, and I couldn't imagine my home without one (that's why I have three). With that being said, yes, any dog regardless of breed is a lot of work. Puppies especially! With a puppy you will constantly be training them, potty training, behavioral training, etc... Potty training always seems to be the most frustrating, and as I was told by my breeder Frenchies are not the easiest to potty train... Not the hardest, but not the easiest either... I would say they score a 5 out of 10 with potty training ha but that's just my opinion.
In regards to the french bulldog breed compared to others (I have a frenchie and 2 large mixed breeds), frenchies are a hoot. They are funny, spunky, and loving... As puppies and young dogs they are energetic, but it seems to burn out quickly with moderate play and exercise, so they won't drive you nuts like some other small breeds.
Frenchies are known to have a long list of heath issues, so just be sure to research all the issues they are prone to and be sure you are willing to work through those issues regardless of money or stress. Some frenchies seem to be as healthy as any other dog, and then others seem to have a long list of issues... I guess you never know, just be sure to pick the most reliable breeder you can. The kind of breeder that has bred the dog for good health traits.
All the work and time and energy in the end is always worth it though in my eyes. My dogs make me laugh and smile, and keep me company any time I am home. My husband and I work opposite shifts so without my dogs I think I would be quite lonely. Hope this little bit helps, I am sure there will be others that will come along and have some awesome advice as well!