Like others said depends on what you like really. Some like internal, while others only like external. Some only like certain materials. There is all kinds of textures.
Hitachi is suppose to be great, however is really bulky in size. I like my
Mini Wanachi, that is smaller and powerful.
As for one that is insert able I have yet to find one. I do not have that many. The
Iconic smoothie is nice. It was not all that powerful if you ask me. I am thinking of trying
Bliss Plastic or
Bliss Silicone. Most likely I would go Silicone because I have found that plastic is very fake feeling.
I love glass toys. Personally my favorite toys to use are
Swell and
Mini Wanachi together. This to me is awesome!
If you want just clitoral bullets and pocket rockets are a nice place to start. Good luck.