Sounds like you had a great time!4 trips in 9 months - wow! I can't afford even once at the moment.
In fact I haven't had a Holiday for 4 years! Also I only get 23 days holiday after 15 years with the company (stingey sods!). I think they would have a fit if I wanted 4 holidays in less than a year!
I wouldn't be able to have it or I would have to leave as they wouldn't be able to do without me for that time as there is only me that does my job here.