I've fished out of a LOT of boats in my days. Have been on many jon boats, the flat bottomed type Fisher bass boats, semi-V's and deep-V's, fiberglass bass boats - you name it. If you are only fishing small ponds or medium sized rivers, the jon will serve you well. If you even occasionally venture onto larger bodies of water, I would not recommend anything less than a deep-V. The semi-V is sort of a compromise, but has a lot of the problems of a jon as well - namely a wet ride. My last boat, a 16' Crestliner, was the widest, best riding deep-V boat I've ever been in. Everyone will have their opinions. But what I've said here will do you just fine.
"A voyage in search of knowledge need never abandon the spirit of adventure."