Portraits - great presents

Once I started to get the hang of painting with acrylic colours I realised that paintings were great to give away to people as presents. I didn't have a great job at the time, and could therefore not afford really fancy presents. These are some of the paintings I've given to people for their birthdays. All the paintings are portraits. The first one is of my sister, the second one is of my ex boyfriend, and the third one is of my ex boyfriend's sister when she was about 5 years old. I must admit that the second one is my favourite, as I was working with contrasts only on this painting. (the quality of this picture isn't great though, since I photographed the painting with my old mobile camera)
What do you think?