In a way, yes, I do. I rushed to the endgame without trying anything else out first. It was very hard for me to justify the $230 purchase at the time, given I'd never typed on a mechanical keyboard before. I wish that I used that money to try other switches first. I got around to purchasing a Pok3r with MX Blues, and it's safe to say that I much prefer Topre.
I do wish that I considered purchasing the HHKB JP instead of the regular HHKB. I know the regular HHKB has a great layout, however, the JP with the arrow keys seems more preferable to me. Eventually I'll get around to trying one out, but at a loss.
Don't get me wrong, HHKB is the best keyboard I've ever owned or used, however, I think that I got lucky that I liked Topre. That's probably because I spent the last ~7 years typing on an HP 5187.