IMO the Romans are one of the most boring factions to play, they have a narrow, one shot, unit roster for most of the game, a cake-walk start position etc.

Now, we have some more interesting things in the pipline but I would suggest you try a different faction that allows you to varry your play-style more.

One of the Hellenistic factions might be good to get you started, Macedonia is interesting and they have so many units you can't have everything in one army.