Though I hate to interrupt such a fascinating debate on the merits of which type to play by answering the initial post's question, I will do so anyhow.
I build my decks in type I (minus the expensive cards, of course), and make it a point to let a potential opponent know that the decks I have are not type II, and if they contain Unglued cards, I mention that, too. Its unbelievable how many people refuse to play based on my decks not being type II.
You'd be amazed at how many people equate the phrase "type I" with "ultra-powerful deck built to crush you with cards you can never hope to own". Its as if they forget about the 14 intervening card sets* between Masques block and Legends (and before). Those of you who have read my deck posts can attest to my decks not being of that ilk -- full of "suboptimal" cards (to use another term meaning "not meant for dueling, and therefore a waste of cardboard") that aren't necessarily powerful, just out of print.
When I point out that its the skill of the player, not the cards in the deck that win the game, I get some disbelief. Then I use the questionable logic that if his deck is sooooooo good, it should be able to beat my paltry type I deck, I can get an opponent.
Another thing I have noticed is how a large number of people (with control issues, I suspect) refuse to play anything so unstructured as a chaos game, especially one of 5-8 people. Being forced to think outside the box and/or to last beyond the fourth turn is unbearable to these players. And should they reluctantly agree to join in, they invariably pick one person, and try to duel with him.
The other players either watch, join in, or interfere, as their natures dictate. Personally, I try to do the polite thing and damage everyone equally (except for the occasional vengeance game, or knowledge of a certain deck's victory conditions) -- just to be fair.
Methinks that constitutes near-rambling... so I guess I should just ramble on, as it were...
*14 sets being Dark, Fallen Empires, Ice Age, Alliances, Homelands, Mirage, Visions, Weatherlight, Tempest, Stronghold, Exodus, Urza's Saga, Legacy, and Destiny.