For me, the bows aren't the only aspect of the hobby/pastime. I also do leatherworking as well as make my own arrows. In addition to that, I got into making crossbows, both medieval/Renaissance and modern. With the crossbows, I've started branching out into some sort of medieval, but fantasy-inspired crossbows as well. What I'm trying to say, is I have a LOT of irons in the fire these days and mostly I'd rather make a fewer bows and have fun shooting them and making all the other stuff to go with them. For me, the cost, time spent with tools and such is greater for making all natural material bows versus glass bows.
To me, it's worth it to spend perhaps a little bit more for some glass and lams versus having to sort through an entire stack of lumber looking for that one piece of hickory, ash, ipe, whatever, just trying to find ONE piece that's worth my time and effort in terms of having good grain. Then, as Mike Keswick said, you can still have stuff like bamboo lifting splinters and such. Nah, I think I'm leaning more towards glass these days for simple durability and little to no tillering involved. I can experiment with a few other designs under glass but for the most part, I really like a Hill style bow with straight limbs and a no-nonsense grip. I think I'll probably expend most of my efforts in the direction of Hill style bows just with different types of woods, veneers under clear glass etc.