The main reason many people from here won't go, is the BYOC cost. For most people £90 is quite steep (£72 with Early Bird Discount, still fairly pricey) but I've been going since i33 (spectator at i35 and i38) just taking my xbox and laptop, and I guarantee you, it's worth every penny. Non-stop gaming from Friday morning (or Thursday early evening for Early Arrival) to Monday afternoon, playing whatever you feel like, there's always something going on. Plus the addition of high prize-fund tournaments like CS:S, CoD, Halo, aswell as a number of big name companies as exhibitors, some running smaller competitions like Quiet PC, who've run Rock Band 2 and SF4 mini-competitions since i36. Plus another plus about i-series, is all the FREEBIES. All the little bits and bobs they give away, t-shirts, pens, computer parts, and loads more i can't remember. Plus they have a huuuuge raffle on the Monday, where they give away tons of stuff from mousemats to PC cases, t-shirts to full Guitar Hero band sets (guitar/drums/mic), and you get a free ticket with your entry pass
I may have got a little carried away there, but that's pretty much everything at an I-series event. Big-prize tournaments, huge LAN games, exhibitors, freebies; attending at least 1 i-event is a must for any gamer
