Roadie (Speed): Vittoria Rubinos are my fav. Just the right combo of light, supple, and surprisingly flat resistant.

Fixed/Commuter(durability): I have a Panaracer T-Serve 25c on the front right now and it is super nice!!! a couple months and not a single flat, rolls nicely, pretty dadgum light. These might just me my new favorite allround tire. I would not hesitate to put them on my roadie! Also Gatorskins b/c light and tough (but at the end of its life my last gator got tons of flats.)

MTB: Kenda Nevegal 2.35. These things are BEAST on my old Fat Chance! They make it ride like a FS bike, they really gobble up anything the trail has to offer! Slow on the hardpack singletrack though... oh well!

Note: I hate the Rando I have on the back now. Many tyres are a pretty tight fit on my Sun M13II rims and Randos are pretty much the worst EVER. Ive only had one flat in 8 months but it took like 10 mins to get the dadgum thing offa the rim! Yes that is the sole reason for hating the tire. Its nice in every other way but NEVER AGAIN! (at least while i have those rims, which might be forever...)