I have a Metropolitan and the only reason I don't use it is because the cap doesn't seal well and the ink evaporates quickly.

Yes, metropolitan is not a “super sealer” which you can leave for a period, then pick up and write. It demands to be used regularly. It also doesn’t like to stand nib-up for long periods.

Because of it, I generally EDC it with a good, low maintenance inks, and try to use it very regularly. As an EDC pen, the nib balances its quirks.

Lamy 2000 and Pilot Custom 823 are two of the most patient pens I have ever used in that regard.