I'm an Arabian enthusiast, they're my breed of choice and always will be. So I'm probably a bit biased but I've been raised with them from birth. I find them the most sweet natured, personable, loyal and docile horses imagineable. I'm sure most people can say that about their breed of choice but there's just a presence, a spirit and a mischevious quality about Arabians that grabs me. I've worked with tons of other breeds, and I still stand by my choice. I value each breed and each horse for their differences, but Arabians have always had something a little extra that I adore.
A lot of people find them "hot" but I personally think that's just the Arabian who's had his spirit channeled in the wrong direction. They're brimming with energy, but a properly trained Arabian will only deliver when you ask for it. I spent my childhood racing around the pastures on our purebred broodmares bareback with nothing but a halter at 7 years old!
Anyway, I think you'll find even for 25 years old, the old guy has plenty of **** and vinegar left! Arabs are well known for the longevity. My good friend in Texas has a 27 year old Arabian mare who's nowhere near close to wanting to retire!