I have had experience with riding and handling both mares and geldings plus one stallion. The stallion belonged to a friend who saw me ride another horse before he let me ride his stallion. It was quite the experience being on the back of a stallion, but not of a gender I'd own for myself.
Of the numerous mares and geldings I have handled and rode over the years before I was able to get my own horse/horses I reckon I prefer mares over geldings, but the geldings being a very close second choice. In fact, actually to close to call which is my preference. However, when we moved to our country acreage and I started shopping for a horse of my own I set my spending limit at $1000. All I wanted was a very nice grade(non-papered) gelding. I did keep an open mind to any possible prospects and it served me well. I answered several "For Sale Ads" and looked at a few of the listings. In 1995 one Sale Ad caught my attention. It was on an AQHA 8 year old mare. I figured she'd be priced at more than my $$$limit, but I called about her anyway. I asked all the pertinent questions then gulped and asked the selling price. The seller was asking $1100
I was a bit shell shocked and asked if that was with her papers included. Again I was
they were including her registered certificate. My Candandy have been each others since this coming July 7 of 1995.
Along with My Candandy I have owned a TWH gelding and an Appy gelding. Both of those geldings were also once in a lifetime horses. I had the papers on the TWH, but not the Appy gelding. Registered Cetificates do not make a horse any more or less special than a good Grade horse.