It can go either way, Many players are profitable playing either style, its understanding your opponents, the math and the game itself that makes the play work. You generally have to adjust depending on how the table is playing, if they are playing super loose you may want to tighten up, if they are playing super tight its easy to take chips playing a little more loose, just dont get over committed to any pot. Its about reading your opponents and playing against their style, not just playing your own. Im generally just a solid, tight player, but i have played very loose in certain situations when i know i can get away with it, and when i know it will psychologically disturb my opponents. It just depends on what works for you, if you played really well by playing loose in the tournament maybe you should think about playing looser in general. If you play tight and end up never getting enough chips then maybe you need to play looser just in general to get more chips. I generally play tight, but allow myself to make some pretty loose calls when i have some chips to try and outflop my opponents and get in where implied odds
are high, so i make up my tight play by getting the pot odds
and implied odds. If you are always tight you will never obtain enough chips to make those calls where you are 50/50 and it wont hurt your stack. Whereas, when you play loose you can gain a lot of chips and make loose calls preflop where you are 60/40 or 50/50 and it wont hurt you much if you lose because its only, say 10% of your entire stack. This is why a lot of times loose play becomes great in tournament play, The only problem is that if you take a couple big losses in a row or end up playing a less than strong hand preflop, you will get yourself into cooler situations where you cant lay down your hand against tighter players with stronger hands. You should basically adjust according to your table, but it sounds as if you dont play loose enough in your general "tight" play to get enough chips to make it to 1st place, So try to loosen up a bit, but still keep your wits about you, thinking about pot odds, %s, implied odds, players to the flop, time in the tournament, and your chip stack. Good luck in future tournaments and congrats on your first place.