To go a bit against the stream--if it's entertaining, I'll read anything. People rail against info dumps, for quite understandable reasons, but many of my favorite books are full of info dumps, character sketches, telling not showing, second person, and all the other horrors--but they're well written.
If you write very engagingly and well, you can do practically anything. Once you have established that you are a good and fun and entertaining writer, I will follow you through anything, just because you have convinced me that the ride will be worth it.
But, the key bit, is that you really do have to write REALLY engagingly and well, and most people--including a lot of published writers--don't. A book is like a road trip. There are people with whom I would take a road trip anywhere with, and the trip will meander and we'll get lost and it'll be fine because we'll be laughing too hard to read the map, and we'll stop at every scenic overlook and World's Largest Ball of Twine, and it will be a blast.
But there aren't many people like that, and most writers are probably better served to just get from Point A to Point B and not dither along the way. And many readers will much prefer that sort of trip. Not everybody wants to stop at the giant ball of twine. Some people insist on eating in the car and speeding past the scenic overlooks and will only stop at a rest stop when you threaten to ruin the upholstery.
So if you're a really fabulous writer, then go for it. If you're not, then be aware that your character sketch may drag you down.