Seeking the face of God is what all Christians do. Desiring it in a particularly supernatural way is fine too, as far as I’m concerned. St. Paul told Christians, “eagerly desire the greater gifts,” and Jesus said, “blessed are the pure in heart, for they shall see God.” The ability to see God is something we all (or at least a lot of us) keenly desire. It is part of being Christian

. David also wrote in the Psalms about seeking the face of God. “Your face, O Lord, I will seek.”
There is nothing at all wrong with wanting to see God. Seeing God is the essence of the Beatific Vision

. To desire that in as many pieces as we possibly can have it while here on Earth is fully good.
I’ve prayed for years to see in the spiritual realm, and that prayer has done wonders for me. The Lord has been answering it on multiple different levels, giving me various kinds of “sight.” I have seen two real, before my physical eyes visions, but then there are so many other ways of seeing God has given me aside from that kind of sight, I am extremely blessed.
It is a wonderful prayer to pray to see God, or to see the heavenly. The Lord is eager to grant it in a variety of ways, and I think that the desire for this itself comes from God. We have to be patient, of course, and be ready both for training that comes prior to the full dose of this, and for gifts of other ways of seeing to preceed it, if God grants it. His ways are above our own and often we are not fully ready for such great things as that, when we first start to ask, so God has to change us to prepare us for it. That’s what I’ve been experiencing, anyway, for several years now.
Of course the others who have posted here are also right, about the deep value of experiencing God in the ordinary. That’s what a lot of our greatest gifts from God are about- ordinary substances like water, oil, bread and wine become supernatural when consumed by God’s Spirit.
We can, of course, already see God in the Eucharist every Mass. We also can hear God directly through the care of our fellow brothers and sisters, “the Body of Christ.”
But to desire a special supernatural vision of the Heavenly is certainly not wrong. If you desire it, though, you do indeed have to be ready to wait, seek and pray as long as God wants (which might be many years), to receive all kinds of unexpected partial fulfillments on the way, to receive training, and very possibly to be used by God in extremely dramatic, hard (and possibly very painful) and/or glorious ways in your future. It’s certainly not a small thing to ask to see God before death in that way. Though I think it is a good thing, and worth seeking

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I’m largely just relating my own experience here, what has resulted for me from praying that prayer for years and never giving up or stopping. It might work differently for you. This is just what I’ve encountered and have been shown to expect to encounter, in my experience of walking on that road.
It is a good thing and worth seeking. Be ready for all the rest of the experience of God we receive on the way, the bulk of our experience, of course

. It is so beautiful all the other ways God reaches out to us too.
But praying at the same time to see the Heavenly is good.