The view here seems to be that George doesn't share Maria's wishes for the Imperial House to serve Russia. And in fact in every interview I've read or seen with HIH, he makes it clear that he does. There seems to be alot of guess work and rather cruel assumption going on here.
I wodner if he might actually be a lot more comfortable with a royal bride rather than a commoner. Princesses are usually socially immured and I do not think that a commoner who is so used to independence would enjoy living a quiet life with Georgi and his mother and really understand how much his heritage might mean to him.
There are a lot of views on here taht suggest that there is little to no point of him worrying about a 'suitable' bride, but what if he did marry a commoner, but the commoner didn't take seriously the things he takes seriously? Like living quietly, being in the 'family sphere' of things, about making a dignified appearance, following traditions that are important for him and his mother, plus maybe walking two steps behind.
However dethroned, there are a lot of royal families that keep the same traditions and customs alive, mainly to preferably carry on and keep things connected to the past. Nothing wrong with that and every family has it's traditions they prefer to observe and respect through the generations. A commoner might take a different view however, of royal tradition and not see the point of many of them.
If he married a royal bride, the bride might understand the importance of the traditions, rules, and understand that there are tight knit family ties that prefer to be maintained. Nothing wrong with that and if Georgi understands and perversely (no matter how politically incorrect) wants a royal bride, it should be understood and respected on here. He can serve Russia, legally, as a private citizen, but socially still have standards.