I have an empty 30 gal and would like a larger fish that would possably be friendly to me or intelagent, does any one have a fish that would mach my interest?
You could put a pair of convicts in there. I know alot of hobbyists may say it's not a good idea, but I raised convicts for about a decade, starting with a pair I got as a child, and had many pairs in 29g.
They definitely will be nice to watch...they are funny fish...you could also try a species tank of puffers. Figure 8's and Green Spotted are funny to watch together.