Re: Im Looking for a fun Nation..who to be?
Venice is a good choice -- just be certain you end your wars before starting the next. As a central mediterean naval power you can be in on a lot.
Crusades -- you should be first and very quickly successful so you can get experience for all generals and nearly all troops.
You get to tangle with the other Italians at their own choosing if you want excitement.
Adjacant to Orthodox and Islamic AI means no need for excommmunication, if that is your game.
Easy to make the Mediterean your own lake.
If in the Middle East before turn 60, you can even get in on the Mongol and Timurid action.
I have other preferences (Cavalry) so if this is also a concern, maybe another power. Only deficit with Venice though. Go for it!