So much has been said that I agree with. We are not solely or even formally an RP-heavy guild. What we have is what I like to term "RP flavour". We prefer guildchat to be RP, but as long as it remains what I call "lol-free", little is frowned upon. When it comes to RP events or really any activity (PvP, Arena, raiding, etc), it's our job as leadership to support those activites and playstyles...not necessarily be the sole instigators of such. I know that I have donated many prize items and devoted some farming hours towards making past RP events more rewarding and interesting, but I've never been an event organiser myself (had my fill of this as a dancer in SWG). I think you'll find similar sentiments from many in the guild, e.g. they're happy to attend and help with planning or supplying things, but have their own schedule confines and interests as well.
It's easy to look at the situation from an RP standpoint and say "RP should be mandatory", but I ask that you look at it from the other facets of the game as well and ask if the same should/would apply. Should we force people to PvP? Raid? The obvious answer is no, we should not and I feel that the same can be said about RP events. Ultimately, we need to understand and support all of our Clanmates' individual interests, even if they're not our own. This may seem bleak from an RP standpoint, but I think what you'll find is that if you go to the trouble of putting together and advertising an RP party or contest, quite a few more people than you would expect will *want* to attend and participate. Also, from past experience, I've found that regular (read: weekly) events tend to be lightly attended, but holiday or seasonal ones garner quite a bit of interest for many reasons.
On a side note, my personal preference RP-wise is usually spontaneous RP rather than "scheduled RP sessions". I often pop my picnic basket and pony keg outside of a town and sit down, greeting passers-by during off-hours. Some choose to stop and RP, others don't, but the variety of stories and levels of participation are fun for me since I never know what to expect and I don't have to put much thought into a theme in advance. There are many scheduled events that happen frequently, often put together by friends of the guild (such as Rajuul, Zebgora, etc) also. If you'd like to find out more about what's out there, I could help direct you to some people to chat with
Oh, one more thing. "Family" is frequently thrown around without any real clarification as to what people mean when they say it. My personal definition of family isn't the "we all sit down at the table every night"...but rather "we care about each other and try to be supportive of each other, even if we can't be there". I live 2,000 miles from my immediate family and am horrible about calling, but I still love them and they know I'm just that way. I like to think of the Clan in the same light - we try to see each other frequently and do what we can, but if some people have activities planned, we understand and enjoy the times we do have with each other when they come.