I used to work in a sex shop, and I just luv 'helping' people to find what they need.
Dildos are good because they give another sensation than what you can get from a real penis, glass is very hard and if you stored it in the fridge, can be very cold, and some is microwable, so it can be very hot as well, I doubt a penis can give you those feelings.
But if you are after a a natural feel of a penis, there are plenty realistic dildos moulding from real penises with cyberskin on it, they feel super real and can come with or without a vibrator as well.
Latex ones are good too, but don't use latex lube with it, the warmth of latex especially when lubed up feels amazingly real
Maybe you just haven't pick out the right one yet, best to go into a shop and choose.
The new one from fun factory, the german made rechargable vibrator is just amazing!!!!!! Vibrator have come just a long way, you really need to constantly upgrade yourself, the new vibrator doesn't just vibrates, it makes it pulse like a real penis, the fun factory one makes it feels like its moving in and out even though it isn't, germans are one of the greatest inventors in this field