I do have different pricing, I have a line of "pre-designed" cakes that I offer now that have a flat price with no customization. You get my design with a message like happy birthday. They are not tiered and when people start wanting changes I tell them that the price is different. Not everyone wants a super fancy custom cake, lots of people just want a pretty cake that tastes good, and I sell a lot of these,
I have a per serving charge for all tiered cakes and any custom cakes. I don't care what the event is that they need them for.
Having friends and family tell you you are "not charging enough" is a blanket blanket statement like "you should be on TV like the Cake Boss!". I hate to say it, but it doesn't mean anything. I know my mom tells me all the time how talented I am and how I could be the next Buddy because "I'm so much better!"
Yeah, not so much.
Realistically, you need to do your math and work out your pricing. Are you covering your costs? Are you covering your overhead? Are you covering your time? If the answer to any of this is "NO", then you are not charging enough and you need to re-work your prices with a business mindset. If the answer is yes, then take the compliment but don't get all crazy and raise your prices just because you think people will value you more, you'll find those people will stop ordering from you because now you charge too much