The shape of the lower barrel is nice. Very similar the the shape my wife turns on her pens. I agree with Clay I too like the knot. It added some character.
Definitely get away from the flash. Try to learn the CA finishing. It appears that these ones have the friction polish. I prefer a more durable finish. Lacquer and CA give a nice polished surface build. A 3 step finish that consists of 3 coats of sanding sealer, 3 coats of friction polish, 3 coats of carnuba wax. A single coat of friction polish isn't enough for me.
Watch the pressure you apply with the nut on the mandrel and the tailstock to the mandrel. It apprears to me that they are slightly eccentric in the middle. That is something that can be tough to avoid on some woods. CA glue in the tubes can also cause it. I use a razor blade and chamfer the ends of the tubes after barrel trimming to ensure the tube runs true on the mandrel.
I hope I'm not being too critical. Being a pen turning instructor I tend to try to point out issues and solutions to help folks learn an improve their pens. Feel free to PM me with any questions.
Good Luck,
John