[pzhon]

You can reasonably play either. Play whatever you prefer.

Many casual players prefer 6-max, since they get to play more hands, both per hour and percentage. You may find it easiest to play a lot of pots against casual players in 6-max.

On the other hand, when you play in a full ring game, you don't have to pay as much attention to what your opponents are doing. You can expect that some of your opponents will be too loose in early position, which you can punish easily by raising with good hands behind them. There is no early position in a 6-max game. Many full ring players who move to shorthanded games discover that much of their advantage in the full ring games came from exploiting that weakness, and they need to work on other aspects of their games. Similarly, set-mining is easier in full-ring games, since you get extra chances to find a pocket pair in each orbit, and it is more likely that someone will have a big pair and will pay you off when you hit, and there tend to be more callers who bloat the pot.

When the first few players in a full ring game fold, this should be very similar to playing shorthanded. However, full ring players are less prepared to deal with blind-stealing, and may give too much credit to an open raise in late position. You might fold AJ after an early position raise, but you should consider 3-betting after a late position raise, since the latter represents much less strength.

Full ring games tend to produce more multiway pots.