Scan the first page of General Discussion and I guarantee you'll see a rage thread about this -- whether it's P2P raging about F2Ps being "cheap," or F2Ps raging about P2Ps being "unskilled", or both parties raging about the rage, it'll be there.
P2P, despite what it may seem, only grants a number of privileges to an SK player. By paying money, you can get:
In this sense, F2P vs. P2P isn't really that big of a difference. F2Ps can do everything else, and are only limited by their mist, which [if you didn't already know] recharges at a rate of 100 every 22 hours [I think it's 13.2 minutes per mist?]. The only gamebreaker is the mist separation, which would give you 200 mist a day instead of 100 [split over two accounts], and the elevator pass, which will then limit your moneymaking by time, and not by mist energy. F2Ps can accrue the same CE, just with more time and more playing, and with luck, OCH will be available for trade soon.
It's worth noting that while every pack is simple currency, the Elevator pass instead grants infinite elevator access for a month, and is only limited by your playtime. If you're in summer vacation with nothing better to do, or are in any parallel situation that allows you to devote hours upon hours to this game, this is the thing to get. I'm of the opinion that it's the best use for money in this game, period: it not only preserves your mist, but lets you play more to enjoy the game as well and lets you join/leave levels haphazardly without worrying about energy loss.
This guide, nevertheless, is F2P oriented, and will assume that you do not buy any of these packs.
There's only a few things this guide requires:
In all honesty, these things are qualities reminiscent of any good SK player. It's nothing new, and it's probably nothing you don't already know. Still, common sense sometimes evades the best of us, and this is my means of preventing that.