Hi all. First let me say that I am a relative newbie (6 months) and I love this site - everyone is so helpful.
My first tank (yep, I have
MTS and plan on getting a larger one) currently has 3 Red Serpae Tetra -- I do plan on getting 2-3 more to make them more comfy -- and a Power Blue Dwarf Gourami.
I love, love, love the Gourami ...he's very relaxing to watch - so graceful and always doing something. He also seems to recognize me when I approach the tank he comes over and almost seems to "wag" his tail

I know, he's probably just associating me with food but I like to think we have a connection

. Also, he isn't shy and will come right to the top when I feed them (I bet he'd eat out of my hand).
Anyway, on to my question (sorry)...because I enjoy this one so much, I would like to get at another Gourami. While I would like to get him a "girlfriend"

I don't really want to breed them so I don't know if getting a female is a good idea. However, I'm also leery about getting another male because I have heard that having two male Gouramis will make them territorial and more aggressive. Is this the case no matter which Gourami I got? Say I got another Dwarf Gourami but not the same
exact same kind -- would my powder blue still be aggressive? Is it the
species or the
size that they respond to?