Well, I've just been knitting for 2 years and I started out with Clover Bamboo straight needles. I was knitting so much and so many different things, I had almost every size of straight and then circular needles, BUT THEN ONE DAY a girl at my LYS said, "here try these needles" I wasn't going to, because I thought they were "metal" and I really liked my bamboo, but I tried them....turns out they were Addi circulars....I haven't gone back! I love them
I have a growing collection of Addi's now and they are the only ones I buy. They are very expensive, but if you go to Ebay you can get good deals on new ones from Hong Kong if you don't mind waiting 10 days to 2 weeks.
They are great to knit with, light and they make the knitting fly.
I think bamboo are great to start out with..for a new knitter, because they are not slippery, but it sounds like you are experienced.
So welcome back Grandma! Is this a first grandchild you are knitting for? I have 4 and I love knitting for them!