Background of this question is: I'm rather tall (1.93m, or 6'3 for Americans). In the past I met up with two men I got to know on dating platforms, and I was shocked at how small they were (they weren't even 1.70), because it somehow felt wrong walking next to them when there was such a high disparity.
As a result, I have asked most guys I get to know how tall they are, and I have made it depend also on whether I meet up with them or not. I was consequently told that I am a dick for making it depend on that by the guys I rejected 

 However, judging by my past experiences, I just feel that I want to be with a man who has my height, or at least isn't much smaller.
My question to you guys is: Do you think I'm discriminating these people based on their size?
And to not make this thread about me only, you can say whether you can imagine dating a man who is a whole lot larger or smaller than you?