The event industry ebbs and flows throughout the year, so you'll have months that you're completely slammed and others, where you're ramping up for those busy months. Some may consider this a con, but personally, I like it because I know exactly what time of year I should book my vacations.
You must be a self starter, willing to learn, step out of your comfort zone, and unafraid to ask questions. Again, not a con if you embody those characteristics/abilities.