I've got a world I'm making with unique races that I'll be using to play with close friends that would like to be able to cooperate with each other more in game.

I definitely am leaning towards making a specific race that is actually mountable, but I was wondering if there were any inherent gameplay/mechanical problems presented by doing this?

The easiest example of an issue I could see is size related issues (Medium vs. Large), but I was thinking that this race is a sizable Medium-sized race, large enough one humanoid can ride atop it but no more. If I'm not mistakened Large creatures are suppose to take up 2x2 squares, so I was going to make this a creature that could take up 1x2 and define the "criteria" for large 2x2 if any players had questions regarding this.

  • \$\begingroup\$ What exactly is your question? I see one sentence with a question mark (“Are there any inherent problems with this?”) but it's not clear what actual problem(s) that is asking about, whether social, mechanical, believable, design, idea, etc. or what. \$\endgroup\$ – SevenSidedDie Oct 5 '15 at 6:55
  • \$\begingroup\$ I meant mechanical, I'll clarify that now \$\endgroup\$ – Skyler Oct 5 '15 at 7:20
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    \$\begingroup\$ The core question is still not clear. The title question: Make sure you identify it as a PC race, since some DM creations are DM / NPC only. Secondly, it appears that you are asking whether or not there are mechanical problems with a medium race riding a medium race. Is that your core question? \$\endgroup\$ – KorvinStarmast Oct 5 '15 at 12:40
  • \$\begingroup\$ Read a couple more questions do you can get an idea of how specific you need to make it. This is very unclear \$\endgroup\$ – Nemenia Oct 5 '15 at 14:46
  • \$\begingroup\$ Well I'm not as much concerned about a medium race riding a medium mount as much as how a medium mount changes the actual mechanics of things your mount can do. \$\endgroup\$ – Skyler Oct 5 '15 at 20:57