I just came back from Whistler, where I took a closer look at skis you guys use. About 75% of skis were twin tips. Funny, mostly seniors were using twin tips. Ironically I was the only one skiing switch, (bored from groomers, and watching my kids that were slugging behind) and I have not seen a single guy using that second tip.
Well, I do understand people buy, what others buy and things are popular, because they are popular. No problem with that, I'm used to it, but when you purchase skis, purchase them towards your own skiing characteristics. Ignore the popular opinion. Your skiing will be more fun that way. Most twin tip skis are heavier by design, and they give up skiing features that you get with regular tails.
If you're a senior take a closer look at your boots, bindings, and skis. You can shave pounds (many) on that package alone. Your skiing we'll become more of a pleasure than a workout.