You know the last one to make me sick inside to lose was my Chocolate. He was like an oscar but not so bullish. My vieja I thought was making me feel that way, but once they start to cause all the problems in your tank, you want to reach in with a stun gun and blast him, so we divorced.
It makes you wonder, do they like you with all the coming to greet you at the glass and shaking around, or does he want to kill me. I felt I had to sleep with one eye open. I still miss him though.
Now, I kept my friends 12 inch female jag for a couple days, and I got attached to her real fast, its the one fish now, I think I would dedicate a big tank to just for a pair.