I got hooked on mechanical watches around a year ago... it's addictive if you like the complexity of making something so small do so many things without an actual battery...
My most favorite watches in my collection:
1) I am a Jaeger Le Coultre fan, have 3 right now:
a) Duometre a Quantieme Lunaire (limited edition)
Special thing here is two seperate barrels powering the escapement and the movement itself, meaning the escapement does not get affected by movements power drain and runs smoother
b) Master Compressor Extreme World Cronograph
Liked the look of the watch, and it has a neat (albeit simple) world time feature around the bezel.
c) Master Grande Tradition Tourbillon Perpetual
A perpetual calendar (which means it displays the correct date and day of week and leap year, without having to reset the watch since it knows which months have how many days) with a flying tourbillon.
2) I do not like the gold in rolex watches, so I have a very simple rolex. The simplest that exist, a Rolex Explorer
3) Patek Philippe, as mentioned before, is one of the most prestigious and oldest companies in mechanical watches. They pioneered things like the perpetual calendars, and the minute repeater. Who better to get a perpetual calendar from?
This is one of the very few perpetual's they sell that actually does not come with a flying tourbillon and a minute repeater built in too.
4) Newest piece in my collection, is a Panerai Luminor 1950 Titanium Tourbillon GMT.
Very simple looking from the front. Dual timezone. Manual, not automatic. But with a nice twist, on the back, the escapement rotates horizontally around its axis, instead of rotating the axis itself as in normal flying tourbillons.
6 days power reserve, via Panerai's standard 3-barrel-system.
This is it for now.. still many watches I am trying to get, but need to do so slowly and most are hard to find.