I think ideally both people should be emotionally mature and have worked on their medos. There are people of all ages who don’t have that.
Perhaps more so today generations are getting shorter with more cultural changes happening quickly. In general the more you could have in common the better. It makes for less areas of potential conflict. So similar hashkafic backgrounds, langual country, income. All that could help but is not essential.
It’s also important to have similar goals in life. How many kids you want, learning vs working. Views regarding Torah vs secular world etc.
You also should be honest with yourself. Just because you may think intellectually that you don’t need a taller guy, you may really feel differently. Don’t fool yourself. You risk being unhappy in your marriage and that will likely show up in how you treat your spouse even if subconsciously. So be really honest with yourself. If you can really get over such issues like high and see yourself happily married to someone shorter or younger than you, then go for it.