Hi,
I have a boy and girl Bengal from the same litter, they are 9 years old now and I've had them since they were kittens.
I have worked full time since I had them and they are fine. I don't think the breed makes that much of a difference to how they are when left alone.
My babies are both gorgeous and very friendly. The one thing to be aware of is that they are quite vocal. When they were kittens I kind of encouraged the 'talking' but now wish I hadn't as they are an awful lot louder now!
Look on youtube for bengal talking and you will see loads of videos which will let you hear the noise I am talking about.
If they would be alone for a bit, its worth considering two kitties, they will keep each other amused. And its great to see them play together.
A few things that are different with Bengals -
They have a stage called 'fuzzy uglies' which mean that their lovely spotty coat is masked by fuzzy hair when they are babies. Look at the marking on the top of their head to see what they would look like later and to indetify them from their littermates.
Also, they need more anthetetic when at the vets. A good vet should know this, but its worth reminding them.
Finally, they develop a little bit slower than other breeds, so do not take them from their mother before 12 weeks old.
They are lovely cats and I'm sure you love them.
Duke.