hello, i currently have 2 boston terriers. A boy zeus and a girl zoe.Both of them are 2 and from the same litter. Honestly I can say that i've always liked females dogs till i got my boy zeus. I love him to death...he's my little man. My male and female listen very well are are very well behaved. My male does like to mark his territory alot outside but thats just a male thing. He did lift his leg on the garbage can for the longest time but has finally kicked that habit. My girl is just a sweet little thing. Sorry my post doesn't really help you because I can't decide. They both are great. Since you have a girl dog maybe another girl would fit it. If i were you and are serious about gettin another dog...I would go to see the pups and go on personality not sex. that is the best advice. Go for the one that comes to you and you find the most appealing and you wont have any regrets, good luck..I would love to see pics when u do decide.

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zeus and zoe's mom