I'm not getting any at the moment but I think I would want a large fish that has some color. It doesn't have to necessarily be very active or crazy like some fish can be. I enjoy watching them swim around of course but it doesn't have to be spastic. (I'm looking at you Mr. Goldfish who wobbles around the tank).
I haven't had any fish in a while just to life being a little crazy and me not having the time to really put into looking after fish like I used to. I feel that if I did ever get the time again to be able to dedicate to taking care and having fish, I would probably end up going for goldfish again to start and working my way up that way on the decision of what to get next.
If I were to get fish, I suppose I'd try some tropical variety/varieties. Well, as I said in an earlier post, the cost wouldn't be light. I know that it would be a while before I could afford this plan.