Everyone is different, but I'll offer my suggestions. I'm not the best pilot by any means, but have flown lots of different airframe types.
I started with the mini super cub as my first plane, a 3CH trainer. When Iwas looking for my next plane Iwent in with the intentions of buying a 4CH trainer, but was afraid I would out grow it very quickly. With that being said here's my suggestions.
Iown the mini pulse xt, and not sure how close it is to the Pulse, but I would consider it a more of a 2nd or 3rd plane. It's not difficult to fly, but is balsa so not as easily repairable as a foamy and the landing gear (mainly the tail) is very week and takeoffs can be interesting on occasion.
I would recommend the following:
* Flyzone Cessna Corvalis 350; low wing scale airplane that is a 5Ch (flaps) and is a pure cupcake to fly. Nice self-righting tendencies, decent speed at wot and/or cruise around at 1/2 throttle if you wish, the large wing span and light frame allows her to glide in very gently similar to a high wing trainer. You don't need to use the flaps at all if you don't wish, but I set mine up for 2 position flaps (even with a dx6i). On very HIGHwind days Itake her out, climb as high as I can cut the throttle and just cruise around as if it was a glider lol. It's a very nice plane, and guys at the field where impressed with the way it flies for the price. Also it is easy repair, but the foam is not as strong as say epo or z-foam. 1 servo for rudder/nws, 1 servo for flaps and 1 servo for ailerons. Easy constrution. Wings come off easily for transport if need be, she's got a large 57" wing span, but uses the common 3s 2200mah packs:
http://www3.towerhobbies.com/cgi-bin...LXCKXG&P=7
* I was also recommend the Parkzone T-28. Check it out on Phoenix. She is probably the tamest most beginner friendly warbird on the market and is recommended as a low-wing trainer. Very nice self-righting tendecies, good speed parts are available at almost any/all LHS and easily repairable. Fly stock for a while then you can trick her out to your liking. Very popular and very successful airplane that you won't outgrow. Fly around "training" for a while then when your ready to move forward into mild aerobatics she also fits the bill. I would suggest the BNFversion and grab yourself a Spektrum dx6i which is one of the best and effortable radios on the market!