As with every aspect of clay, we all have our preferences and favored methods for achieving them. I would advise making as sure as possible that your handles are attached well, no matter what their shape.
I seldom make two handles alike on mugs. Every human's hands are different sizes and shapes and people hold their cups and mugs differently from each other. The holding is often dictated by the handle, but I've found that it's a fun conversation, especially at craft shows, to ask people what they like in a handle. Are you a two-finger holder, a three-finger holder, do you put your fingers through the handle, but hold the mug? Do you put your thumb on the top of the handle or do you grip the entire handle in your fist? I put thumb rests (buttons of clay) on the tops of some and customers comment that they like them. When I attach the buttons, I usually make an thumb-shaped indention in them or maybe run the top edge out a little bit as a kind of stop point for the end of the thumb. I just got one out of the kiln yesterday that I'll be taking to a show this weekend that is very whimsical. I put a thumb on top of the handle and I call it "Two Thumbs Up!" When I hold the mug, it looks as though there are two thumbs on it. The nail on the mug is forward of my own. I did that just as a little attention-getter and will place it around about the rest of the mugs to see if it gets any comments. It's a good thing I'm not a "set" person at this stage of my life, because I've never been able to make exact duplicates well and in my part of the world, customers at shows either get a single mug. They enjoy trying out all the different handle shapes and configurations and deciding which one feels the best.
Pulling handles is very professional and a great way to learn to make duplicates. If that's priority with you, then disregard all my ramblings. Watch a YouTube video by Simon Leach on pulling handles. If personalization pleases you, roll a sort of fat coil of clay and give it a little squeeze in the middle. Curve it to suit the shape of the mug it will go on and cut it with enough space to allow for shrinkage. I think you'll be surprised at how comfortable it is to use when fingers naturally lay into those places.
I was looking at a pottery display in a craft mall once when a very tall, very large man stopped to look, also. I asked him what kind of mugs did he like and how did he hold one. He'd never given it much thought, he said, because restaurant mugs are much the same and he held them however he could. He said he only used what was available at home, too. That started a brief handle conversation and I made several mugs after that, that I called "Man Handlers"; large mugs with longer handle openings for larger fingers and a little bit bigger diameter so big guys can feel the handle.
Enjoy what you do. Practice and practice some more and as long as your ware is well made, don't be afraid to try different shapes and forms. When they behave the way they're supposed to after they come out of the kiln, you'll have fun with your art/craft and customers will be pleased that you're thinking of them. By making multiples of the same shapes and sizes, you'll gain product recognition and the multiples draw those for whom having like things are important.
Robin Hopper is the ultimate in contemporary pottery mastery, and these folks on the forum give us great advice and ideas. Welcome to the world of clay!