you must have a predilection for irony.

here is a bit of good advice that I found:

You should use obsolete or archaic words when:

1 No other word will serve (as in a scholarly piece about history or linguistics, for example).

2 You want to confuse your audience or make them laugh.

3 You want to sound pretentious or pedantic.

Note: this is hard advice for me to pass on, as I have an entire web site based on obscure, abstruse and/or recondite words, which often run to obsolete and archaic extremes.