Bettas are great. We've had a number over the years, but no fish right now.
Your Ghostie reminds me of my Fwish. I had him about 3-3.5 years I think, my longest living.
Girls are awesome too - I picked up one for a change from the boys, and she had such a big personality, it was awesome. Actually both of my girls did (one would rustle in her stones after I turned out the light, the other jumped out of her tank once).