It's not a bad decision at all. It's just more about your preferences. Cash games are more of a slow grind to build up your stack. If you don't like being forced into action due to rising blinds/antes and you have many days/hours available, then cash games may be better for you. If you like the thrill of going for a big payout and the changing dynamics of tournament play and/or you don't have many hours/days available top play, then tournaments may be better. Personally, I fall into the latter group. If you are new to tournaments, you'll have to get a feel for how to adjust play as your stack size changes and you enter the different stages of the tournament. For me, it was a bit of shock just how different play is between a cash game and a tournament. Both of my tournament cashes involved super aggressive play with a short stack.
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