I've had canoes, pontoon craft, small john boats over the years but once I got into the SOT kayaks several years ago, I have yet to look back. My wife and I fish off ours quite often and have had them in all types of fresh and salt water. For river fishing, I like the fact that I can paddle up current with little effort and using a drift chute, it's possible to hit all the productive water thoroughly. Lakes and ponds? A kayak is very stealthy if you are mindful of what you are doing, don't bang around your equipment and use the paddle to just sneak along. I have found that storage is not so much and issue if you pre-plan and pre-rig your fishing gear before launching. A crate set-up allows you to carry more tackle than you problably need as well as other essentials you need on the water. It may not be for everyone, but I find it to be a very good fishing platform with the benefit of comfort. You can launch a kayak just about anywhere and it has no more transport issues than any other similar craft. If you can, paddle as many types and styles as possible to get a feel for what will suit you the most. Wind is less of a problem in a kayak than in a canoe and that alone is a major plus IMO.
Jeff